diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 461172c2..b0fc97e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,3 +33,15 @@ jobs:
 
       - name: Check formatting
         run: cargo +nightly fmt --verbose --all --check
+
+      - name: Validate configs
+        uses: cardinalby/schema-validator-action@v3
+        with:
+          file: 'etc/defaults/config*.yaml'
+          schema: 'schema/json/config.schema.json'
+
+      - name: Validate themes
+        uses: cardinalby/schema-validator-action@v3
+        with:
+          file: 'etc/defaults/themes/*.yaml|src/testing/assets/themes/*.yaml'
+          schema: 'schema/json/theme.schema.json'
diff --git a/schema/json/theme.schema.json b/schema/json/theme.schema.json
index 72e4e881..37b10405 100644
--- a/schema/json/theme.schema.json
+++ b/schema/json/theme.schema.json
@@ -1,6 +1,5 @@
 {
     "$schema": "http://json-schema.org/draft-07/schema#",
-    "$id": "schema:theme",
     "$ref": "#/definitions/theme",
     "definitions": {
         "theme": {
diff --git a/src/testing/assets/themes/test.yaml b/src/testing/assets/themes/test.yaml
index c13bb405..369cf5b2 100644
--- a/src/testing/assets/themes/test.yaml
+++ b/src/testing/assets/themes/test.yaml
@@ -1,5 +1,5 @@
 # yaml-language-server: $schema=../../../../schema/json/theme.schema.json
-$schema: ../../../../schema/json/theme.schema.json
+$schema: https://raw.githubusercontent.com/pamburus/hl/master/schema/json/theme.schema.json
 
 elements:
   input: