diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1553245e5..6e13b3875 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Try to save exported ConfigDB settings (migrate_from_db) in the system temp directory if default location is not writable.
 - Uploading custom instance thumbnail via AdminAPI/AdminFE generated invalid URL to the image
+- Applying ConcurrentLimiter settings via AdminAPI
 
 ## [2.3.0] - 2020-03-01
 
diff --git a/lib/pleroma/config_db.ex b/lib/pleroma/config_db.ex
index b874e0e37..cb57673e3 100644
--- a/lib/pleroma/config_db.ex
+++ b/lib/pleroma/config_db.ex
@@ -387,6 +387,6 @@ defp find_valid_delimiter([delimiter | others], pattern, regex_delimiter) do
   @spec module_name?(String.t()) :: boolean()
   def module_name?(string) do
     Regex.match?(~r/^(Pleroma|Phoenix|Tesla|Quack|Ueberauth|Swoosh)\./, string) or
-      string in ["Oban", "Ueberauth", "ExSyslogger"]
+      string in ["Oban", "Ueberauth", "ExSyslogger", "ConcurrentLimiter"]
   end
 end
diff --git a/test/pleroma/web/admin_api/controllers/config_controller_test.exs b/test/pleroma/web/admin_api/controllers/config_controller_test.exs
index c4d07d61c..c39c1b1e1 100644
--- a/test/pleroma/web/admin_api/controllers/config_controller_test.exs
+++ b/test/pleroma/web/admin_api/controllers/config_controller_test.exs
@@ -1452,6 +1452,40 @@ test "custom instance thumbnail", %{conn: conn} do
 
       assert res = %{"thumbnail" => "https://example.com/media/new_thumbnail.jpg"}
     end
+
+    test "Concurrent Limiter", %{conn: conn} do
+      clear_config([ConcurrentLimiter])
+
+      params = %{
+        "group" => ":pleroma",
+        "key" => "ConcurrentLimiter",
+        "value" => [
+          %{
+            "tuple" => [
+              "Pleroma.Web.RichMedia.Helpers",
+              [
+                %{"tuple" => [":max_running", 6]},
+                %{"tuple" => [":max_waiting", 6]}
+              ]
+            ]
+          },
+          %{
+            "tuple" => [
+              "Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy",
+              [
+                %{"tuple" => [":max_running", 7]},
+                %{"tuple" => [":max_waiting", 7]}
+              ]
+            ]
+          }
+        ]
+      }
+
+      assert conn
+             |> put_req_header("content-type", "application/json")
+             |> post("/api/pleroma/admin/config", %{"configs" => [params]})
+             |> json_response_and_validate_schema(200)
+    end
   end
 
   describe "GET /api/pleroma/admin/config/descriptions" do