diff --git a/metadata/org.sufficientlysecure.keychain.yml b/metadata/org.sufficientlysecure.keychain.yml
index 097674b0bc..71f29bccc5 100644
--- a/metadata/org.sufficientlysecure.keychain.yml
+++ b/metadata/org.sufficientlysecure.keychain.yml
@@ -744,7 +744,9 @@ Builds:
     submodules: true
     gradle:
       - fdroid
-    scanignore:
+    prebuild: echo 'org.gradle.jvmargs=-Xmx1g' >> ../gradle.properties
+    scandelete:
+      - extern/bouncycastle/libs
       - extern/bouncycastle/test
       - extern/bouncycastle/core/src/test
       - extern/bouncycastle/pg/src/test