diff --git a/.golangci.yml b/.golangci.yml
index 33a5523..29a8677 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,11 +1,10 @@
 run:
-  skip-dirs:
-    - docs
-    - datadog
-    - kustomize
-  skip-files:
-    - 'wire_gen.go'
   tests: false
+issues:
+  exclude-files:
+    - 'wire_gen.go'
+  exclude-dirs:
+    - docs
 linters-settings:
   errcheck:
     check-type-assertions: true
diff --git a/schemareg.go b/schemareg.go
index f6bc3bc..dbca923 100644
--- a/schemareg.go
+++ b/schemareg.go
@@ -13,7 +13,7 @@ import (
 )
 
 type schemaRegistryFactory struct {
-	mmu   sync.Mutex
+	m     sync.Mutex
 	srCls map[string]schemaregistry.Client
 }
 
@@ -104,6 +104,9 @@ func (c *schemaRegistryFactory) createJson(srConfig SchemaRegistryConfig) (jsonF
 }
 
 func (c *schemaRegistryFactory) getSchemaClient(srConfig SchemaRegistryConfig) (schemaregistry.Client, error) {
+	c.m.Lock()
+	defer c.m.Unlock()
+
 	url := srConfig.URL
 	if url == "" {
 		return nil, errors.New("no schema registry url provided")