diff --git a/.changeset/ninety-panthers-guess.md b/.changeset/ninety-panthers-guess.md
new file mode 100644
index 0000000000..a821731a22
--- /dev/null
+++ b/.changeset/ninety-panthers-guess.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend-module-github': patch
+---
+
+Fixed a bug where the visibility filter was case sensitive and casting was inconsistent.
diff --git a/plugins/catalog-backend-module-github/src/lib/util.ts b/plugins/catalog-backend-module-github/src/lib/util.ts
index bb91e9dd2a..58ae8d6551 100644
--- a/plugins/catalog-backend-module-github/src/lib/util.ts
+++ b/plugins/catalog-backend-module-github/src/lib/util.ts
@@ -107,5 +107,10 @@ export function satisfiesVisibilityFilter(
   if (!visibilities.length) {
     return true;
   }
-  return visibilities.includes(visibility);
+  const lowerCaseVisibilities = visibilities.map(v =>
+    v.toLocaleLowerCase('en-US'),
+  );
+  const lowerCaseVisibility = visibility.toLocaleLowerCase('en-US');
+
+  return lowerCaseVisibilities.includes(lowerCaseVisibility);
 }