diff --git a/Pipfile b/Pipfile
index 72b6e86..cb898a8 100644
--- a/Pipfile
+++ b/Pipfile
@@ -8,7 +8,7 @@ coverage = "*"
 flake8 = "*"
 pytest = "*"
 pytest-cov = "*"
-pytest-mock = "*"
+pytest-mock = "==3.15.0"
 
 [packages]
 attrs = "==22.1.0"
@@ -29,7 +29,7 @@ pyflakes = "==2.2.0"
 pyparsing = "==2.4.7"
 pytest = "==6.1.1"
 pytest-cov = "==2.10.1"
-pytest-mock = "==3.3.1"
+pytest-mock = "==3.15.0"
 requests = "==2.24.0"
 six = "==1.15.0"
 toml = "==0.10.1"
diff --git a/Pipfile.lock b/Pipfile.lock
index 9581ca4..4e916ec 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -197,12 +197,8 @@
             "version": "==2.10.1"
         },
         "pytest-mock": {
-            "hashes": [
-                "sha256:024e405ad382646318c4281948aadf6fe1135632bea9cc67366ea0c4098ef5f2",
-                "sha256:a4d6d37329e4a893e77d9ffa89e838dd2b45d5dc099984cf03c703ac8411bb82"
-            ],
-            "index": "pypi",
-            "version": "==3.3.1"
+            "hashes": [],
+            "version": "==3.15.0"
         },
         "requests": {
             "hashes": [
@@ -395,12 +391,8 @@
             "version": "==2.10.1"
         },
         "pytest-mock": {
-            "hashes": [
-                "sha256:024e405ad382646318c4281948aadf6fe1135632bea9cc67366ea0c4098ef5f2",
-                "sha256:a4d6d37329e4a893e77d9ffa89e838dd2b45d5dc099984cf03c703ac8411bb82"
-            ],
-            "index": "pypi",
-            "version": "==3.3.1"
+            "hashes": [],
+            "version": "==3.15.0"
         },
         "six": {
             "hashes": [
diff --git a/requirements-dev.txt b/requirements-dev.txt
index bea1863..08e6087 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -14,7 +14,7 @@ pyflakes==2.2.0
 pyparsing==2.4.7
 pytest==6.1.1
 pytest-cov==2.10.1
-pytest-mock==3.3.1
+pytest-mock==3.15.0
 six==1.15.0
 toml==0.10.1
 wcwidth==0.2.5