diff --git a/.github/scripts/release-snapshot.sh b/.github/scripts/release-snapshot.sh
index 5d8bad940..da4d0a8df 100755
--- a/.github/scripts/release-snapshot.sh
+++ b/.github/scripts/release-snapshot.sh
@@ -31,6 +31,8 @@ if [[ -e "build/publications/maven/module.json.asc" ]]; then
   cp "build/libs/plantuml-${RELEASE_VERSION}-javadoc.jar.asc" "github_release/plantuml-SNAPSHOT-javadoc.jar.asc"
   cp "build/libs/plantuml-${RELEASE_VERSION}-sources.jar.asc" "github_release/plantuml-SNAPSHOT-sources.jar.asc"
   cp "build/libs/plantuml-pdf-${RELEASE_VERSION}.jar.asc" "github_release/plantuml-pdf-SNAPSHOT.jar.asc"
+  ls -l build/libs
+  ls -l plantuml-mit/build/libs
   cp "plantuml-mit/build/libs/plantuml-mit-${RELEASE_VERSION}.jar.asc" "github_release/plantuml-mit-SNAPSHOT.jar.asc"
   cp "plantuml-mit/build/libs/plantuml-mit-${RELEASE_VERSION}-sources.jar.asc" "github_release/plantuml-mit-SNAPSHOT-sources.jar.asc"
 fi
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 18a145564..de3b60a80 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -146,6 +146,8 @@ jobs:
           ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.ARTIFACT_SIGNING_PASSPHRASE }}
         run: |
           gradle -i signMavenPublication signPdfJar
+          ls -l build/libs
+          ls -l plantuml-mit/build/libs
       - name: Get release version
         id: version
         run: |
diff --git a/plantuml-mit/build.gradle.kts b/plantuml-mit/build.gradle.kts
index 1eb63ed7e..4521301b1 100644
--- a/plantuml-mit/build.gradle.kts
+++ b/plantuml-mit/build.gradle.kts
@@ -157,3 +157,16 @@ publishing {
 		}
 	}
 }
+
+signing {
+	if (hasProperty("signing.gnupg.keyName") && hasProperty("signing.gnupg.passphrase")) {
+		useGpgCmd()
+	} else if (hasProperty("signingKey") && hasProperty("signingPassword")) {
+		val signingKey: String? by project
+		val signingPassword: String? by project
+		useInMemoryPgpKeys(signingKey, signingPassword)
+	}
+	if (hasProperty("signing.gnupg.passphrase") || hasProperty("signingPassword")) {
+		sign(publishing.publications["maven"])
+	}
+}