diff --git a/dev/release.sh b/dev/release.sh
index ac822392..351a3d95 100755
--- a/dev/release.sh
+++ b/dev/release.sh
@@ -26,7 +26,7 @@ git pull
 tox
 
 # Bump version.
-sed -i -e "s/__version__ = '.*'/__version__ = '$VERSION'/" vulture/core.py
+sed -i -e "s/__version__ = \".*\"/__version__ = \"$VERSION\"/" vulture/core.py
 git commit -am "Update version number to ${VERSION} for release."
 git tag -a "v$VERSION" -m "v$VERSION" HEAD