diff --git a/sphinx/__init__.py b/sphinx/__init__.py
index 07c61917017..85efe1de599 100644
--- a/sphinx/__init__.py
+++ b/sphinx/__init__.py
@@ -34,7 +34,7 @@
 
 package_dir = path.abspath(path.dirname(__file__))
 
-_in_development = True
+_in_development = False
 if _in_development:
     # Only import subprocess if needed
     import subprocess