diff --git a/VERSION.txt b/VERSION.txt
index 0ecd4397d..5edffce6d 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-1.39.0.dev1
+1.39.0
diff --git a/doc/requirements.txt b/doc/requirements.txt
index c5062bfe0..7d90f0b70 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,4 @@
-nnabla==1.39.0.dev1
+nnabla==1.39.0
 Sphinx<7
 sphinx-rtd-theme>=1.2
 mock