diff --git a/Pipfile.lock b/Pipfile.lock
index b3c0525..c902ce9 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -156,10 +156,10 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:b84b238cce0d9adad5ed87e745778d20a3f8487d0f0cb8b8a586816c7496458d",
-                "sha256:c833ef592a0324bcc6a60e48440da07645063c453880c9477ceb22490aec1564"
+                "sha256:70401259e46e216056367a0a6034ee3d3f95e0bf59d3aa6a4eb77837171ed996",
+                "sha256:8c746e0d09871661520da4f1241ba6b908dc903839733c8203b552cffaf173bd"
             ],
-            "version": "==8.0.2"
+            "version": "==8.9.0"
         },
         "packaging": {
             "hashes": [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 39f24f0..119241a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pyflakes==2.1.1
 
 #deps pytest
 py==1.8.0
-more-itertools==8.0.2
+more-itertools==8.9.0
 six==1.13.0
 attrs==19.3.0
 pluggy==0.13.1