diff --git a/Pipfile b/Pipfile
index 72b6e86..b0d5408 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,7 +21,7 @@ idna = "==2.10"
 importlib-metadata = "==2.0.0"
 iniconfig = "==1.1.1"
 mccabe = "==0.6.1"
-more-itertools = "==8.5.0"
+more-itertools = "==10.8.0"
 pluggy = "==0.13.1"
 py = "==1.9.0"
 pycodestyle = "==2.6.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index 9581ca4..4178993 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -125,12 +125,8 @@
             "version": "==0.6.1"
         },
         "more-itertools": {
-            "hashes": [
-                "sha256:6f83822ae94818eae2612063a5101a7311e68ae8002005b5e05f03fd74a86a20",
-                "sha256:9b30f12df9393f0d28af9210ff8efe48d10c94f73e5daf886f10c4b0b0b4f03c"
-            ],
-            "index": "pypi",
-            "version": "==8.5.0"
+            "hashes": [],
+            "version": "==10.8.0"
         },
         "packaging": {
             "hashes": [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index bea1863..bf0e3d5 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ flake8==3.8.4
 importlib-metadata==2.0.0
 iniconfig==1.1.1
 mccabe==0.6.1
-more-itertools==8.5.0
+more-itertools==10.8.0
 packaging==20.4
 pluggy==0.13.1
 py==1.9.0