diff --git a/package.json b/package.json
index 7d92d28..bf178bb 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@types/mongoose": "^4.0.0 || ^5.0.0",
-    "debug": "^3.0.0",
+    "debug": "^4.0.0",
     "tslib": "^1.0.0",
     "typescript-lazy-get-decorator": "^1.0.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 0233734..de687e0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -472,7 +472,7 @@ debug-log@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debug-log/-/debug-log-1.0.1.tgz#2307632d4c04382b8df8a32f70b895046d52745f"
 
-debug@3.1.0, debug@^3.0.0, debug@^3.1.0:
+debug@3.1.0, debug@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   dependencies:
@@ -484,6 +484,12 @@ debug@^2.1.3:
   dependencies:
     ms "2.0.0"
 
+debug@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.0.0.tgz#ef7592a30b1c5e05a78e96926df2e6b36b5544e7"
+  dependencies:
+    ms "^2.1.1"
+
 decamelize@^1.1.1:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
@@ -1199,6 +1205,10 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+ms@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
+
 nice-try@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"