diff --git a/MacDown/MacDown-Info.plist b/MacDown/MacDown-Info.plist
index 080ed19..b2851e8 100644
--- a/MacDown/MacDown-Info.plist
+++ b/MacDown/MacDown-Info.plist
@@ -37,7 +37,7 @@
 	<key>CFBundleIconFile</key>
 	<string></string>
 	<key>CFBundleIdentifier</key>
-	<string>org.uranusjr.${PRODUCT_NAME:rfc1034identifier}</string>
+	<string>com.uranusjr.${PRODUCT_NAME:rfc1034identifier:lower}</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
diff --git a/MacDownTests/MacDownTests-Info.plist b/MacDownTests/MacDownTests-Info.plist
index aa23b2d..633fa97 100644
--- a/MacDownTests/MacDownTests-Info.plist
+++ b/MacDownTests/MacDownTests-Info.plist
@@ -7,7 +7,7 @@
 	<key>CFBundleExecutable</key>
 	<string>${EXECUTABLE_NAME}</string>
 	<key>CFBundleIdentifier</key>
-	<string>org.uranusjr.${PRODUCT_NAME:rfc1034identifier}</string>
+	<string>com.uranusjr.${PRODUCT_NAME:rfc1034identifier:lower}</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundlePackageType</key>