diff --git a/.github/workflows/scripts/get-image-tags.rb b/.github/workflows/scripts/get-image-tags.rb
index bdcb230..0bf30cc 100755
--- a/.github/workflows/scripts/get-image-tags.rb
+++ b/.github/workflows/scripts/get-image-tags.rb
@@ -18,7 +18,7 @@ def main
       git_ref_name: git_ref_name,
       git_ref_type: git_ref_type,
       git_default_branch: git_default_branch,
-      package: JSON.parse(File.read('package.json')),
+      semver: '0.0.0',
     ).to_a.join(',')
 
   # log to stderr so that stdout only contains the full tags
diff --git a/.github/workflows/scripts/lib.rb b/.github/workflows/scripts/lib.rb
index d8d0353..462ea24 100644
--- a/.github/workflows/scripts/lib.rb
+++ b/.github/workflows/scripts/lib.rb
@@ -10,7 +10,7 @@ def get_image_tags(
   git_ref_name: nil,
   git_ref_type: nil,
   git_default_branch: nil,
-  package: nil
+  semver: nil
 )
   container_repo = "ghcr.io/#{git_repo.downcase}"
   versions = Set[]
@@ -20,9 +20,9 @@ def get_image_tags(
     versions.add(git_ref_name.downcase.gsub(/[^a-z0-9._\n]+/, '-'))
   elsif git_ref_type == 'tag'
     # add version tag
-    versions.add(package['version'])
+    versions.add(semver)
     # TODO: check that this is actually latest
-    parsed = parse_semver(package['version'])
+    parsed = parse_semver(semver)
     if parsed.pre == nil
       versions.add(parsed.major)
       versions.add("#{parsed.major}.#{parsed.minor}")
diff --git a/.github/workflows/scripts/test/get-image-tags.unit.rb b/.github/workflows/scripts/test/get-image-tags.unit.rb
index 32e69b9..6490d84 100755
--- a/.github/workflows/scripts/test/get-image-tags.unit.rb
+++ b/.github/workflows/scripts/test/get-image-tags.unit.rb
@@ -13,7 +13,7 @@ class TestGetImageTags < Test::Unit::TestCase
         git_ref_name: 'feat/foo-bar',
         git_ref_type: 'branch',
         git_default_branch: 'master',
-        package: JSON.parse('{"version": "1.0.0"}'),
+        semver: '1.0.0',
       ),
     )
 
@@ -27,7 +27,7 @@ class TestGetImageTags < Test::Unit::TestCase
         git_ref_name: 'master',
         git_ref_type: 'branch',
         git_default_branch: 'master',
-        package: JSON.parse('{"version": "1.0.0"}'),
+        semver: '1.0.0',
       ),
     )
   end
@@ -46,7 +46,7 @@ class TestGetImageTags < Test::Unit::TestCase
         git_ref_name: '1.0.0',
         git_ref_type: 'tag',
         git_default_branch: 'master',
-        package: JSON.parse('{"version": "1.0.0"}'),
+        semver: '1.0.0',
       ),
     )
   end
@@ -63,7 +63,7 @@ class TestGetImageTags < Test::Unit::TestCase
         git_ref_name: '1.0.0',
         git_ref_type: 'tag',
         git_default_branch: 'master',
-        package: JSON.parse('{"version": "1.0.0-pre"}'),
+        semver: '1.0.0-pre',
       ),
     )
   end
@@ -76,7 +76,7 @@ class TestGetImageTags < Test::Unit::TestCase
         git_ref_name: 'feat/Foo---bar',
         git_ref_type: 'branch',
         git_default_branch: 'master',
-        package: JSON.parse('{"version": "1.0.0"}'),
+        semver: '1.0.0',
       ),
     )
   end