diff --git a/Pipfile b/Pipfile
index 14f5a64..f63f750 100644
--- a/Pipfile
+++ b/Pipfile
@@ -7,6 +7,7 @@ name = "pypi"
 hbmqtt = "*"
 aiohttp = "*"
 tinydb = "*"
+pyyaml = ">=4.2b1"
 
 [dev-packages]
 black = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index 9ef710e..a17abe8 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -139,6 +139,7 @@
                 "sha256:e4d6b5d6218a06f3141189d75c93876dd525a6d15f1b00ef4f274726c93719f1",
                 "sha256:f3c386fa12415bde8a0162745c4badf98fe171c6dfd67e54831f05ec88feeebb"
             ],
+            "index": "pypi",
             "version": "==5.1b5"
         },
         "six": {