diff --git a/poetry.lock b/poetry.lock
index 460a23f..dc8d311 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry and should not be changed by hand.
 
 [[package]]
 name = "appnope"
@@ -1378,19 +1378,16 @@ reference = "tsinghua"
 
 [[package]]
 name = "pymemcache"
-version = "3.5.2"
+version = "4.0.0"
 description = "A comprehensive, fast, pure Python memcached client"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=3.7"
 files = [
-    {file = "pymemcache-3.5.2-py2.py3-none-any.whl", hash = "sha256:3fca0215845d7b2ecd5f4c627fcf4ce2345a703a897b7e116380115b5a197be2"},
-    {file = "pymemcache-3.5.2.tar.gz", hash = "sha256:8923ab59840f0d5338f1c52dba229fa835545b91c3c2f691c118e678d0fb974e"},
+    {file = "pymemcache-4.0.0-py2.py3-none-any.whl", hash = "sha256:f507bc20e0dc8d562f8df9d872107a278df049fa496805c1431b926f3ddd0eab"},
+    {file = "pymemcache-4.0.0.tar.gz", hash = "sha256:27bf9bd1bbc1e20f83633208620d56de50f14185055e49504f4f5e94e94aff94"},
 ]
 
-[package.dependencies]
-six = "*"
-
 [package.source]
 type = "legacy"
 url = "https://pypi.tuna.tsinghua.edu.cn/simple"
@@ -1874,4 +1871,4 @@ reference = "tsinghua"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8.1,<4.0"
-content-hash = "b0ff434e09bbf283102e45af812d2897a9fdc7a4f6225188061594994182d8b0"
+content-hash = "cc459ac57ef1ef1973241214b46bb35ffb58fd82351bbe6bca3c139cb88e560c"
diff --git a/pyproject.toml b/pyproject.toml
index 2b529b2..d2dfb4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ pytest-django = "^4.5.2"
 pytest-mock = "^3.10.0"
 pytest-xdist = "^3.2.0"
 flake8-pyproject = "^1.2.2"
-pymemcache = "^3.5.0"
+pymemcache = ">=3.5,<5.0"
 cryptography = "^39.0.2"
 requests-mock = "^1.10.0"
 fakeredis = "^2.10.0"