diff --git a/.github/workflows/github-packages-publish.yml b/.github/workflows/github-packages-publish.yml
index c083358..9894b8a 100644
--- a/.github/workflows/github-packages-publish.yml
+++ b/.github/workflows/github-packages-publish.yml
@@ -19,7 +19,7 @@ on:
 jobs:
   publish:
     name: Build and Publish
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     permissions:
       contents: read
 
diff --git a/common-toolbox/build.gradle.kts b/common-toolbox/build.gradle.kts
index 542f580..40f20e0 100644
--- a/common-toolbox/build.gradle.kts
+++ b/common-toolbox/build.gradle.kts
@@ -112,6 +112,7 @@ publishing {
             from(components["java"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["commonToolbox"])
             }
         }
diff --git a/crypto-toolbox/build.gradle.kts b/crypto-toolbox/build.gradle.kts
index ed4b40b..e7b7034 100644
--- a/crypto-toolbox/build.gradle.kts
+++ b/crypto-toolbox/build.gradle.kts
@@ -116,6 +116,7 @@ publishing {
             from(components["java"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["cryptoToolbox"])
             }
         }
diff --git a/identity-generator/build.gradle.kts b/identity-generator/build.gradle.kts
index d076fc5..1889597 100644
--- a/identity-generator/build.gradle.kts
+++ b/identity-generator/build.gradle.kts
@@ -112,6 +112,7 @@ publishing {
             from(components["java"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["identityGenerator"])
             }
         }
diff --git a/math-toolbox/build.gradle.kts b/math-toolbox/build.gradle.kts
index 3a44116..910e86b 100644
--- a/math-toolbox/build.gradle.kts
+++ b/math-toolbox/build.gradle.kts
@@ -113,6 +113,7 @@ publishing {
             from(components["java"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["mathToolbox"])
             }
         }
diff --git a/tuple/build.gradle.kts b/tuple/build.gradle.kts
index 870bd1a..ba5fdda 100644
--- a/tuple/build.gradle.kts
+++ b/tuple/build.gradle.kts
@@ -113,6 +113,7 @@ publishing {
             from(components["java"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["tuple"])
             }
         }
diff --git a/version-catalogue/build.gradle.kts b/version-catalogue/build.gradle.kts
index 90f945b..9e90dde 100644
--- a/version-catalogue/build.gradle.kts
+++ b/version-catalogue/build.gradle.kts
@@ -100,6 +100,7 @@ publishing {
             from(components["javaPlatform"])
 
             signing {
+                setRequired(project.hasProperty("signing.keyId"))
                 sign(publishing.publications["versionCatalogue"])
             }
         }