diff --git a/metadata/com.sanzoghenzo.markdownr.yml b/metadata/com.sanzoghenzo.markdownr.yml
index fd168efdf1..01b464ecf1 100644
--- a/metadata/com.sanzoghenzo.markdownr.yml
+++ b/metadata/com.sanzoghenzo.markdownr.yml
@@ -166,7 +166,7 @@ Builds:
     srclibs:
       - flutter@stable
     prebuild:
-      - sed -i -e 's/-Xmx1536m/-Xmx4096m/' android/gradle.properties
+      - sed -i -e 's/-Xmx1536M/-Xmx4096m/' android/gradle.properties
       - version=$(sed -n -E 's/.*flutter-version:\ "(.*)"/\1/p' .github/workflows/release.yml)
       - pushd $$flutter$$
       - git checkout -f $version