diff --git a/.changeset/odd-buckets-compare.md b/.changeset/odd-buckets-compare.md
new file mode 100644
index 0000000000..faf68fb4a0
--- /dev/null
+++ b/.changeset/odd-buckets-compare.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-common': patch
+---
+
+Set explicit content-type in error handler responses.
diff --git a/.changeset/strange-cobras-unite.md b/.changeset/strange-cobras-unite.md
new file mode 100644
index 0000000000..d53a324dab
--- /dev/null
+++ b/.changeset/strange-cobras-unite.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Refactored route response handling to use more explicit types and throw errors.