diff --git a/android/app/build.gradle b/android/app/build.gradle
index c405afe604..1b65f4ba24 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -15,8 +15,8 @@ android {
         }
         minSdkVersion 21
         targetSdkVersion 26
-        versionCode 172
-        versionName "0.6pre11"
+        versionCode 173
+        versionName "0.6pre12"
         externalNativeBuild {
             cmake {
                 arguments "-DANDROID_APP_PLATFORM=android-21", "-DANDROID_STL=c++_static", "-DWARNINGS_ARE_ERRORS=ON"
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index c9d858a60e..8d52bb0c37 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.tildearrow.furnace"
-    android:versionCode="172"
-    android:versionName="0.6pre11"
+    android:versionCode="173"
+    android:versionName="0.6pre12"
     android:installLocation="auto">
 
     <!-- OpenGL ES 2.0 -->
diff --git a/papers/clipboard-format.md b/papers/clipboard-format.md
index 3da7ebc4c3..891ed1112d 100644
--- a/papers/clipboard-format.md
+++ b/papers/clipboard-format.md
@@ -6,7 +6,7 @@ when copying pattern data from Furnace, it's stored in the clipboard as plain te
 org.tildearrow.furnace - Pattern Data (144)
 ```
 
-this top line of text is always the same except for the number in parentheses, which is the internal build number. for example, 0.6pre11 is `172`.
+this top line of text is always the same except for the number in parentheses, which is the internal build number. for example, 0.6pre12 is `173`.
 
 the second line is a number between 0 and 18 (decimal) which indicates which column the clip starts from.
 - `0`: note.
diff --git a/papers/format.md b/papers/format.md
index d6732d91bd..46bceaab13 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -32,6 +32,7 @@ these fields are 0 in format versions prior to 100 (0.6pre1).
 
 the format versions are:
 
+- 173: Furnace 0.6pre12
 - 172: Furnace 0.6pre11
 - 171: Furnace 0.6pre10
 - 169: Furnace 0.6pre9
diff --git a/res/Info.plist b/res/Info.plist
index 8edb442a3d..770c11e769 100644
--- a/res/Info.plist
+++ b/res/Info.plist
@@ -15,17 +15,17 @@
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleLongVersionString</key>
-	<string>0.6pre11</string>
+	<string>0.6pre12</string>
 	<key>CFBundleName</key>
 	<string>Furnace</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.6pre11</string>
+	<string>0.6pre12</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>0.6pre11</string>
+	<string>0.6pre12</string>
 	<key>NSHumanReadableCopyright</key>
 	<string></string>
 	<key>NSHighResolutionCapable</key>
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 914a207ddc..2f323a5f40 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -58,8 +58,8 @@ class DivWorkPool;
 
 #define DIV_UNSTABLE
 
-#define DIV_VERSION "0.6pre11"
-#define DIV_ENGINE_VERSION 172
+#define DIV_VERSION "0.6pre12"
+#define DIV_ENGINE_VERSION 173
 // for imports
 #define DIV_VERSION_MOD 0xff01
 #define DIV_VERSION_FC 0xff02