diff --git a/imageio/__init__.py b/imageio/__init__.py
index 3a757d65e..ce8a861db 100644
--- a/imageio/__init__.py
+++ b/imageio/__init__.py
@@ -26,7 +26,7 @@
 for more information.
 """
 
-__version__ = '0.5.1dev'
+__version__ = '1.0'
 
 # Load some bits from core
 from .core import FormatManager, RETURN_BYTES  # noqa