diff --git a/src/schemas/validation/schema.yaml b/src/schemas/validation/schema.yaml
index 6e392a1387..184757439a 100644
--- a/src/schemas/validation/schema.yaml
+++ b/src/schemas/validation/schema.yaml
@@ -7,7 +7,7 @@ type: object
 properties:
   openapi:
     type: string
-    pattern: '^3\.1\.\d+(-.+)?$'
+    pattern: '^3\.1\.[0-9]+(-.+)?$'
   info:
     $ref: '#/$defs/info'
   jsonSchemaDialect:
diff --git a/tests/schema/fail/openapi-version.yaml b/tests/schema/fail/openapi-version.yaml
new file mode 100644
index 0000000000..a70838cb0d
--- /dev/null
+++ b/tests/schema/fail/openapi-version.yaml
@@ -0,0 +1,5 @@
+openapi: 3.1.৪
+info:
+  title: BENGALI DIGIT FOUR is a valid digit, but not an ascii digit
+  version: 1.0.0
+paths: {}