diff --git a/README.md b/README.md
index 777504c..cb7b27f 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ compiles to:
 ### API Usage [![Clojars Project](https://img.shields.io/clojars/v/cirru/sepal.svg)](https://clojars.org/cirru/sepal)
 
 ```edn
-[cirru/sepal "0.2.8"]
+[cirru/sepal "0.2.9-a1"]
 ```
 
 ```clojure
diff --git a/data/compiled/def.cljs b/data/compiled/def.cljs
index 5c89637..76a0eb6 100644
--- a/data/compiled/def.cljs
+++ b/data/compiled/def.cljs
@@ -11,6 +11,8 @@
 
 (defn f2 ([a b] (+ a b)) ([a b c] (+ a b c)))
 
+(defn ^:dev/after-load f3 [])
+
 (defn- f1 [x] (+ x 1))
 
 (println :key "string" "c" "\n")
diff --git a/data/examples/def.edn b/data/examples/def.edn
index 80a1e0e..b9ab0ee 100644
--- a/data/examples/def.edn
+++ b/data/examples/def.edn
@@ -7,5 +7,6 @@
   "f2"
   [["a" "b"] ["+" "a" "b"]]
   [["a" "b" "c"] ["+" "a" "b" "c"]]]
+ ["defn" "^:dev/after-load" "f3" []]
  ["defn-" "f1" ["x"] ["+" "x" "1"]]
  ["println" ":key" "|string" "\\c" "\\newline"]]
diff --git a/package.json b/package.json
index cb806d0..d6aa103 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sepal.clj",
-  "version": "0.2.8",
+  "version": "0.2.9-a1",
   "main": "index.js",
   "repository": "git@github.com:Cirru/sepal.clj.git",
   "author": "jiyinyiyong <jiyinyiyong@gmail.com>",
@@ -11,6 +11,6 @@
     "test": "yarn compile && node target/test.js"
   },
   "devDependencies": {
-    "shadow-cljs": "^2.10.17"
+    "shadow-cljs": "^2.10.19"
   }
 }
diff --git a/polyfill/cirru_sepal/core.cljs b/polyfill/cirru_sepal/core.cljs
index 7c3a0d2..d723b95 100644
--- a/polyfill/cirru_sepal/core.cljs
+++ b/polyfill/cirru_sepal/core.cljs
@@ -12,10 +12,18 @@
 (defn transform-apply [xs]
   (map transform-x xs))
 
+(defn transform-defn-meta [tag func params & body]
+   (assert (string? func) "[Sepal] function name should be a symbol!")
+   (assert (coll? params) "[Sepal] params should be a sequence!")
+   `(~'defn ~(symbol tag) ~(symbol func) [~@(map transform-x params)] ~@(map transform-x body)))
+
 (defn transform-defn [func params & body]
-  (assert (string? func) "[Sepal] function name should be a symbol!")
-  (assert (coll? params) "[Sepal] params should be a sequence!")
-  `(~'defn ~(symbol func) [~@(map transform-x params)] ~@(map transform-x body)))
+ (if (string/starts-with? func "^")
+  (apply transform-defn-meta func params body)
+  (do
+   (assert (string? func) "[Sepal] function name should be a symbol!")
+   (assert (coll? params) "[Sepal] params should be a sequence!")
+   `(~'defn ~(symbol func) [~@(map transform-x params)] ~@(map transform-x body)))))
 
 (defn transform-defn$ [func & body]
   (assert (string? func) "[Sepal] function name should be a symbol!")
diff --git a/release.edn b/release.edn
index b1bcd3a..89a9649 100644
--- a/release.edn
+++ b/release.edn
@@ -1,4 +1,4 @@
-{:version "0.2.8",
+{:version "0.2.9-a1",
  :group-id "cirru",
  :artifact-id "sepal",
  :skip-tag true,
diff --git a/yarn.lock b/yarn.lock
index 29aa195..ca5c95d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -84,15 +84,15 @@ browserify-rsa@^4.0.0, browserify-rsa@^4.0.1:
     randombytes "^2.0.1"
 
 browserify-sign@^4.0.0:
-  version "4.2.0"
-  resolved "https://registry.npm.taobao.org/browserify-sign/download/browserify-sign-4.2.0.tgz#545d0b1b07e6b2c99211082bf1b12cce7a0b0e11"
-  integrity sha1-VF0LGwfmssmSEQgr8bEsznoLDhE=
+  version "4.2.1"
+  resolved "https://registry.npm.taobao.org/browserify-sign/download/browserify-sign-4.2.1.tgz?cache=0&sync_timestamp=1596557797092&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fbrowserify-sign%2Fdownload%2Fbrowserify-sign-4.2.1.tgz#eaf4add46dd54be3bb3b36c0cf15abbeba7956c3"
+  integrity sha1-6vSt1G3VS+O7OzbAzxWrvrp5VsM=
   dependencies:
     bn.js "^5.1.1"
     browserify-rsa "^4.0.1"
     create-hash "^1.2.0"
     create-hmac "^1.1.7"
-    elliptic "^6.5.2"
+    elliptic "^6.5.3"
     inherits "^2.0.4"
     parse-asn1 "^5.1.5"
     readable-stream "^3.6.0"
@@ -148,12 +148,12 @@ core-util-is@~1.0.0:
   integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
 
 create-ecdh@^4.0.0:
-  version "4.0.3"
-  resolved "https://registry.npm.taobao.org/create-ecdh/download/create-ecdh-4.0.3.tgz#c9111b6f33045c4697f144787f9254cdc77c45ff"
-  integrity sha1-yREbbzMEXEaX8UR4f5JUzcd8Rf8=
+  version "4.0.4"
+  resolved "https://registry.npm.taobao.org/create-ecdh/download/create-ecdh-4.0.4.tgz?cache=0&sync_timestamp=1596557796546&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fcreate-ecdh%2Fdownload%2Fcreate-ecdh-4.0.4.tgz#d6e7f4bffa66736085a0762fd3a632684dabcc4e"
+  integrity sha1-1uf0v/pmc2CFoHYv06YyaE2rzE4=
   dependencies:
     bn.js "^4.1.0"
-    elliptic "^6.0.0"
+    elliptic "^6.5.3"
 
 create-hash@^1.1.0, create-hash@^1.1.2, create-hash@^1.2.0:
   version "1.2.0"
@@ -217,9 +217,9 @@ domain-browser@^1.1.1:
   resolved "https://registry.npm.taobao.org/domain-browser/download/domain-browser-1.2.0.tgz#3d31f50191a6749dd1375a7f522e823d42e54eda"
   integrity sha1-PTH1AZGmdJ3RN1p/Ui6CPULlTto=
 
-elliptic@^6.0.0, elliptic@^6.5.2:
+elliptic@^6.5.3:
   version "6.5.3"
-  resolved "https://registry.npm.taobao.org/elliptic/download/elliptic-6.5.3.tgz?cache=0&sync_timestamp=1592492742430&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Felliptic%2Fdownload%2Felliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
+  resolved "https://registry.npm.taobao.org/elliptic/download/elliptic-6.5.3.tgz?cache=0&sync_timestamp=1592492734974&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Felliptic%2Fdownload%2Felliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
   integrity sha1-y1nrLv2vc6C9eMzXAVpirW4Pk9Y=
   dependencies:
     bn.js "^4.4.0"
@@ -232,7 +232,7 @@ elliptic@^6.0.0, elliptic@^6.5.2:
 
 events@^3.0.0:
   version "3.2.0"
-  resolved "https://registry.npm.taobao.org/events/download/events-3.2.0.tgz?cache=0&sync_timestamp=1595422555438&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fevents%2Fdownload%2Fevents-3.2.0.tgz#93b87c18f8efcd4202a461aec4dfc0556b639379"
+  resolved "https://registry.npm.taobao.org/events/download/events-3.2.0.tgz?cache=0&sync_timestamp=1595422651095&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fevents%2Fdownload%2Fevents-3.2.0.tgz#93b87c18f8efcd4202a461aec4dfc0556b639379"
   integrity sha1-k7h8GPjvzUICpGGuxN/AVWtjk3k=
 
 evp_bytestokey@^1.0.0, evp_bytestokey@^1.0.3:
@@ -245,7 +245,7 @@ evp_bytestokey@^1.0.0, evp_bytestokey@^1.0.3:
 
 hash-base@^3.0.0:
   version "3.1.0"
-  resolved "https://registry.npm.taobao.org/hash-base/download/hash-base-3.1.0.tgz#55c381d9e06e1d2997a883b4a3fddfe7f0d3af33"
+  resolved "https://registry.npm.taobao.org/hash-base/download/hash-base-3.1.0.tgz?cache=0&sync_timestamp=1588318012719&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fhash-base%2Fdownload%2Fhash-base-3.1.0.tgz#55c381d9e06e1d2997a883b4a3fddfe7f0d3af33"
   integrity sha1-VcOB2eBuHSmXqIO0o/3f5/DTrzM=
   dependencies:
     inherits "^2.0.4"
@@ -362,7 +362,7 @@ node-libs-browser@^2.0.0:
 
 object-assign@^4.1.1:
   version "4.1.1"
-  resolved "https://registry.npm.taobao.org/object-assign/download/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  resolved "https://registry.npm.taobao.org/object-assign/download/object-assign-4.1.1.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fobject-assign%2Fdownload%2Fobject-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
   integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
 
 os-browserify@^0.3.0:
@@ -372,12 +372,12 @@ os-browserify@^0.3.0:
 
 pako@~1.0.5:
   version "1.0.11"
-  resolved "https://registry.npm.taobao.org/pako/download/pako-1.0.11.tgz#6c9599d340d54dfd3946380252a35705a6b992bf"
+  resolved "https://registry.npm.taobao.org/pako/download/pako-1.0.11.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fpako%2Fdownload%2Fpako-1.0.11.tgz#6c9599d340d54dfd3946380252a35705a6b992bf"
   integrity sha1-bJWZ00DVTf05RjgCUqNXBaa5kr8=
 
 parse-asn1@^5.0.0, parse-asn1@^5.1.5:
   version "5.1.5"
-  resolved "https://registry.npm.taobao.org/parse-asn1/download/parse-asn1-5.1.5.tgz?cache=0&sync_timestamp=1568806175683&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fparse-asn1%2Fdownload%2Fparse-asn1-5.1.5.tgz#003271343da58dc94cace494faef3d2147ecea0e"
+  resolved "https://registry.npm.taobao.org/parse-asn1/download/parse-asn1-5.1.5.tgz#003271343da58dc94cace494faef3d2147ecea0e"
   integrity sha1-ADJxND2ljclMrOSU+u89IUfs6g4=
   dependencies:
     asn1.js "^4.0.0"
@@ -389,12 +389,12 @@ parse-asn1@^5.0.0, parse-asn1@^5.1.5:
 
 path-browserify@0.0.1:
   version "0.0.1"
-  resolved "https://registry.npm.taobao.org/path-browserify/download/path-browserify-0.0.1.tgz?cache=0&sync_timestamp=1583254548523&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fpath-browserify%2Fdownload%2Fpath-browserify-0.0.1.tgz#e6c4ddd7ed3aa27c68a20cc4e50e1a4ee83bbc4a"
+  resolved "https://registry.npm.taobao.org/path-browserify/download/path-browserify-0.0.1.tgz#e6c4ddd7ed3aa27c68a20cc4e50e1a4ee83bbc4a"
   integrity sha1-5sTd1+06onxoogzE5Q4aTug7vEo=
 
 pbkdf2@^3.0.3:
   version "3.1.1"
-  resolved "https://registry.npm.taobao.org/pbkdf2/download/pbkdf2-3.1.1.tgz?cache=0&sync_timestamp=1591276015876&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fpbkdf2%2Fdownload%2Fpbkdf2-3.1.1.tgz#cb8724b0fada984596856d1a6ebafd3584654b94"
+  resolved "https://registry.npm.taobao.org/pbkdf2/download/pbkdf2-3.1.1.tgz#cb8724b0fada984596856d1a6ebafd3584654b94"
   integrity sha1-y4cksPramEWWhW0abrr9NYRlS5Q=
   dependencies:
     create-hash "^1.1.2"
@@ -497,12 +497,12 @@ ripemd160@^2.0.0, ripemd160@^2.0.1:
 
 safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@^5.2.0, safe-buffer@~5.2.0:
   version "5.2.1"
-  resolved "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.2.1.tgz?cache=0&sync_timestamp=1589129978562&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsafe-buffer%2Fdownload%2Fsafe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  resolved "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.2.1.tgz?cache=0&sync_timestamp=1589129611964&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsafe-buffer%2Fdownload%2Fsafe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
   integrity sha1-Hq+fqb2x/dTsdfWPnNtOa3gn7sY=
 
 safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
-  resolved "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.1.2.tgz?cache=0&sync_timestamp=1589129978562&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsafe-buffer%2Fdownload%2Fsafe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  resolved "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.1.2.tgz?cache=0&sync_timestamp=1589129611964&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsafe-buffer%2Fdownload%2Fsafe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
   integrity sha1-mR7GnSluAxN0fVm9/St0XDX4go0=
 
 setimmediate@^1.0.4:
@@ -512,7 +512,7 @@ setimmediate@^1.0.4:
 
 sha.js@^2.4.0, sha.js@^2.4.8:
   version "2.4.11"
-  resolved "https://registry.npm.taobao.org/sha.js/download/sha.js-2.4.11.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsha.js%2Fdownload%2Fsha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
+  resolved "https://registry.npm.taobao.org/sha.js/download/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
   integrity sha1-N6XPC4HsvGlD3hCbopYNGyZYSuc=
   dependencies:
     inherits "^2.0.1"
@@ -523,10 +523,10 @@ shadow-cljs-jar@1.3.2:
   resolved "https://registry.npm.taobao.org/shadow-cljs-jar/download/shadow-cljs-jar-1.3.2.tgz#97273afe1747b6a2311917c1c88d9e243c81957b"
   integrity sha1-lyc6/hdHtqIxGRfByI2eJDyBlXs=
 
-shadow-cljs@^2.10.17:
-  version "2.10.17"
-  resolved "https://registry.npm.taobao.org/shadow-cljs/download/shadow-cljs-2.10.17.tgz#490aea50f95481bb40936d79bade3aa62033dca3"
-  integrity sha1-SQrqUPlUgbtAk215ut46piAz3KM=
+shadow-cljs@^2.10.19:
+  version "2.10.19"
+  resolved "https://registry.npm.taobao.org/shadow-cljs/download/shadow-cljs-2.10.19.tgz#907bbad10bb3af38f6a728452e3cd9c34f1166d1"
+  integrity sha1-kHu60Quzrzj2pyhFLjzZw08RZtE=
   dependencies:
     node-libs-browser "^2.0.0"
     readline-sync "^1.4.7"
@@ -537,7 +537,7 @@ shadow-cljs@^2.10.17:
 
 source-map-support@^0.4.15:
   version "0.4.18"
-  resolved "https://registry.npm.taobao.org/source-map-support/download/source-map-support-0.4.18.tgz?cache=0&sync_timestamp=1587719493563&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsource-map-support%2Fdownload%2Fsource-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
+  resolved "https://registry.npm.taobao.org/source-map-support/download/source-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
   integrity sha1-Aoam3ovkJkEzhZTpfM6nXwosWF8=
   dependencies:
     source-map "^0.5.6"
@@ -549,7 +549,7 @@ source-map@^0.5.6:
 
 stream-browserify@^2.0.1:
   version "2.0.2"
-  resolved "https://registry.npm.taobao.org/stream-browserify/download/stream-browserify-2.0.2.tgz?cache=0&sync_timestamp=1587041581155&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fstream-browserify%2Fdownload%2Fstream-browserify-2.0.2.tgz#87521d38a44aa7ee91ce1cd2a47df0cb49dd660b"
+  resolved "https://registry.npm.taobao.org/stream-browserify/download/stream-browserify-2.0.2.tgz#87521d38a44aa7ee91ce1cd2a47df0cb49dd660b"
   integrity sha1-h1IdOKRKp+6RzhzSpH3wy0ndZgs=
   dependencies:
     inherits "~2.0.1"
@@ -557,7 +557,7 @@ stream-browserify@^2.0.1:
 
 stream-http@^2.7.2:
   version "2.8.3"
-  resolved "https://registry.npm.taobao.org/stream-http/download/stream-http-2.8.3.tgz#b2d242469288a5a27ec4fe8933acf623de6514fc"
+  resolved "https://registry.npm.taobao.org/stream-http/download/stream-http-2.8.3.tgz?cache=0&sync_timestamp=1588701397289&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fstream-http%2Fdownload%2Fstream-http-2.8.3.tgz#b2d242469288a5a27ec4fe8933acf623de6514fc"
   integrity sha1-stJCRpKIpaJ+xP6JM6z2I95lFPw=
   dependencies:
     builtin-status-codes "^3.0.0"
@@ -604,7 +604,7 @@ ultron@~1.1.0:
 
 url@^0.11.0:
   version "0.11.0"
-  resolved "https://registry.npm.taobao.org/url/download/url-0.11.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Furl%2Fdownload%2Furl-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
+  resolved "https://registry.npm.taobao.org/url/download/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
   integrity sha1-ODjpfPxgUh63PFJajlW/3Z4uKPE=
   dependencies:
     punycode "1.3.2"
@@ -617,14 +617,14 @@ util-deprecate@^1.0.1, util-deprecate@~1.0.1:
 
 util@0.10.3:
   version "0.10.3"
-  resolved "https://registry.npm.taobao.org/util/download/util-0.10.3.tgz?cache=0&sync_timestamp=1588238580972&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Futil%2Fdownload%2Futil-0.10.3.tgz#7afb1afe50805246489e3db7fe0ed379336ac0f9"
+  resolved "https://registry.npm.taobao.org/util/download/util-0.10.3.tgz?cache=0&sync_timestamp=1588238397004&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Futil%2Fdownload%2Futil-0.10.3.tgz#7afb1afe50805246489e3db7fe0ed379336ac0f9"
   integrity sha1-evsa/lCAUkZInj23/g7TeTNqwPk=
   dependencies:
     inherits "2.0.1"
 
 util@^0.11.0:
   version "0.11.1"
-  resolved "https://registry.npm.taobao.org/util/download/util-0.11.1.tgz?cache=0&sync_timestamp=1588238580972&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Futil%2Fdownload%2Futil-0.11.1.tgz#3236733720ec64bb27f6e26f421aaa2e1b588d61"
+  resolved "https://registry.npm.taobao.org/util/download/util-0.11.1.tgz?cache=0&sync_timestamp=1588238397004&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Futil%2Fdownload%2Futil-0.11.1.tgz#3236733720ec64bb27f6e26f421aaa2e1b588d61"
   integrity sha1-MjZzNyDsZLsn9uJvQhqqLhtYjWE=
   dependencies:
     inherits "2.0.3"
@@ -636,14 +636,14 @@ vm-browserify@^1.0.1:
 
 which@^1.3.1:
   version "1.3.1"
-  resolved "https://registry.npm.taobao.org/which/download/which-1.3.1.tgz?cache=0&sync_timestamp=1574116092455&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fwhich%2Fdownload%2Fwhich-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
+  resolved "https://registry.npm.taobao.org/which/download/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
   integrity sha1-pFBD1U9YBTFtqNYvn1CRjT2nCwo=
   dependencies:
     isexe "^2.0.0"
 
 ws@^3.0.0:
   version "3.3.3"
-  resolved "https://registry.npm.taobao.org/ws/download/ws-3.3.3.tgz?cache=0&sync_timestamp=1593925670988&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fws%2Fdownload%2Fws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
+  resolved "https://registry.npm.taobao.org/ws/download/ws-3.3.3.tgz?cache=0&sync_timestamp=1593925746458&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fws%2Fdownload%2Fws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
   integrity sha1-8c+E/i1ekB686U767OeF8YeiKPI=
   dependencies:
     async-limiter "~1.0.0"