diff --git a/release.sh b/release.sh
index 63e6e136803b5e69db6d23bbf1b6debfbb46ccd4..5525d026b07f7f4915a68215a6af77abdf9ed662 100755
--- a/release.sh
+++ b/release.sh
@@ -6,7 +6,7 @@ echo "Current version: $current"
 
 if [[ $1 =~ ^[0-9]+.[0-9]+.[0-9]+[0-9A-Za-z]*$ ]]; then
   IFS='.' read -r -a array <<< "$1"
-  sed -i "s/__version_info__\ = ($current)/__version_info__ = ('${array[0]}', '${array[1]}', '${array[2]}')/g" src/sakia/__init__.py
+  sed -i "s/__version_info__\ = ($current)/__version_info__ = (\"${array[0]}\", \"${array[1]}\", \"${array[2]}\")/g" src/sakia/__init__.py
   sed -i "s/#define MyAppVerStr .*/#define MyAppVerStr \"$1\"/g" ci/appveyor/sakia.iss
   sed -i "s/Version: .*/Version: $1/g" ci/travis/debian/DEBIAN/control
   sed -i "s/Version=.*/Version=$1/g" res/linux/usr/share/applications/sakia.desktop
diff --git a/src/sakia/__init__.py b/src/sakia/__init__.py
index e0a594ddcecde00955086a78d4b8e7fa287e7a3c..6308366deed098882bb6a90b88ebfac9e6e545d6 100644
--- a/src/sakia/__init__.py
+++ b/src/sakia/__init__.py
@@ -1,2 +1,2 @@
-__version_info__ = ('0', '50', '1')
+__version_info__ = ("0", "50", "1")
 __version__ = ".".join(__version_info__)