diff --git a/backend/src/app/metrics.clj b/backend/src/app/metrics.clj
index aa5979c4a..c11d3d112 100644
--- a/backend/src/app/metrics.clj
+++ b/backend/src/app/metrics.clj
@@ -132,7 +132,7 @@
 
 (defmethod run-collector! :counter
   [{:keys [::mdef/instance]} {:keys [inc labels] :or {inc 1 labels default-empty-labels}}]
-  (let [instance (.labels instance (if (is-array? labels) labels (into-array String labels)))]
+  (let [instance (.labels ^Counter instance (if (is-array? labels) labels (into-array String labels)))]
     (.inc ^Counter$Child instance (double inc))))
 
 (defmethod run-collector! :gauge
diff --git a/backend/src/app/rpc/commands/binfile.clj b/backend/src/app/rpc/commands/binfile.clj
index 87945779f..bd7eb1b61 100644
--- a/backend/src/app/rpc/commands/binfile.clj
+++ b/backend/src/app/rpc/commands/binfile.clj
@@ -294,7 +294,7 @@
 
 (defn- retrieve-file
   [pool file-id]
-  (with-open [conn (db/open pool)]
+  (with-open [^AutoCloseable conn (db/open pool)]
     (binding [pmap/*load-fn* (partial files/load-pointer conn file-id)]
       (some-> (db/get* conn :file {:id file-id})
               (files/decode-row)