diff --git a/hack/release-build.sh b/hack/release-build.sh
index da31e50a..85fc30e6 100755
--- a/hack/release-build.sh
+++ b/hack/release-build.sh
@@ -182,6 +182,8 @@ build_all_env_builders() {
     build_env_builder_image "$version" "jvm"      "jvm-builder"      ""
     build_env_builder_image "$version" "nodejs"   "node-builder"     ""
     build_env_builder_image "$version" "php7"     "php-builder"      ""
+    build_env_builder_image "$version" "ruby"     "ruby-env"         ""
+    build_env_builder_image "$version" "dotnet20" "dotnet20-env"     ""
 }
 
 build_charts() {
diff --git a/hack/release.sh b/hack/release.sh
index f25c7f1f..7aad7419 100755
--- a/hack/release.sh
+++ b/hack/release.sh
@@ -117,6 +117,8 @@ push_all_env_builders() {
     push_env_builder_image "$version" "go"       "go-builder"       "1.11.4"
     push_env_builder_image "$version" "jvm"      "jvm-builder"      ""
     push_env_builder_image "$version" "nodejs"   "node-builder"     ""
+    push_env_builder_image "$version" "ruby"     "ruby-env"         ""
+    push_env_builder_image "$version" "dotnet20" "dotnet20-env"     ""
 }
 
 # Push pre-upgrade-checks image