diff --git a/src/schemas/validation/schema.yaml b/src/schemas/validation/schema.yaml
index 135e14ff52..e8896b505d 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\.2\.\d+(-.+)?$'
+    pattern: '^3\.2\.[0-9]+(-.+)?$'
   $self:
     type: string
     format: uri-reference
diff --git a/tests/schema/fail/openapi-version.yaml b/tests/schema/fail/openapi-version.yaml
new file mode 100644
index 0000000000..afed313cd7
--- /dev/null
+++ b/tests/schema/fail/openapi-version.yaml
@@ -0,0 +1,5 @@
+openapi: 3.2.৪
+info:
+  title: BENGALI DIGIT FOUR is a valid digit, but not an ascii digit
+  version: 1.0.0
+paths: {}