diff --git a/pkgs/development/python-modules/praw/default.nix b/pkgs/development/python-modules/praw/default.nix
index 0243ef1bd1b4..09417a8d82b5 100644
--- a/pkgs/development/python-modules/praw/default.nix
+++ b/pkgs/development/python-modules/praw/default.nix
@@ -9,7 +9,7 @@
 , pytestCheckHook
 , pythonOlder
 , requests-toolbelt
-, update_checker
+, update-checker
 , websocket-client
 }:
 
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     mock
     prawcore
-    update_checker
+    update-checker
     websocket-client
   ];
 
diff --git a/pkgs/development/python-modules/update_checker/default.nix b/pkgs/development/python-modules/update-checker/default.nix
similarity index 87%
rename from pkgs/development/python-modules/update_checker/default.nix
rename to pkgs/development/python-modules/update-checker/default.nix
index d3bd5522d122..4a6056a99f7b 100644
--- a/pkgs/development/python-modules/update_checker/default.nix
+++ b/pkgs/development/python-modules/update-checker/default.nix
@@ -2,13 +2,14 @@
 }:
 
 buildPythonPackage rec {
-  pname = "update_checker";
+  pname = "update-checker";
   version = "0.18.0";
   format = "setuptools";
   disabled = isPy27;
 
   src = fetchPypi {
-    inherit pname version;
+    pname = "update_checker";
+    inherit version;
     sha256 = "6a2d45bb4ac585884a6b03f9eade9161cedd9e8111545141e9aa9058932acb13";
   };
 
diff --git a/pkgs/development/tools/analysis/checkov/default.nix b/pkgs/development/tools/analysis/checkov/default.nix
index 54e68dd852a2..156622a568b9 100644
--- a/pkgs/development/tools/analysis/checkov/default.nix
+++ b/pkgs/development/tools/analysis/checkov/default.nix
@@ -81,7 +81,7 @@ python3.pkgs.buildPythonApplication rec {
     termcolor
     tqdm
     typing-extensions
-    update_checker
+    update-checker
   ];
 
   nativeCheckInputs = with python3.pkgs; [
diff --git a/pkgs/development/tools/circup/default.nix b/pkgs/development/tools/circup/default.nix
index 08ea01ca240b..b6aa75a36fc8 100644
--- a/pkgs/development/tools/circup/default.nix
+++ b/pkgs/development/tools/circup/default.nix
@@ -31,7 +31,7 @@ python3.pkgs.buildPythonApplication rec {
     requests
     semver
     setuptools
-    update_checker
+    update-checker
   ];
 
   nativeCheckInputs = with python3.pkgs; [
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index ce36f16a9024..2bbbaedc9458 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -488,6 +488,7 @@ mapAliases ({
   ufoLib2 = ufolib2; # added 2024-01-07
   ukrainealarm = throw "ukrainealarm has been removed, as it has been replaced as a home-assistant dependency by uasiren."; # added 2024-01-05
   unittest2 = throw "unittest2 has been removed as it's a backport of unittest that's unmaintained and not needed beyond Python 3.4."; # added 2022-12-01
+  update_checker = update-checker; # added 2024-01-07
   uproot3 = throw "uproot3 has been removed, use uproot instead"; # added 2022-12-13
   uproot3-methods = throw "uproot3-methods has been removed"; # added 2022-12-13
   validictory = throw "validictory has been removed, since it abandoned"; # added 2023-07-07
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 662af2cff032..07b73a71e6aa 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -15672,7 +15672,7 @@ self: super: with self; {
 
   upcloud-api = callPackage ../development/python-modules/upcloud-api { };
 
-  update_checker = callPackage ../development/python-modules/update_checker { };
+  update-checker = callPackage ../development/python-modules/update-checker { };
 
   update-copyright = callPackage ../development/python-modules/update-copyright { };