diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index e7c548c67d08..fef781e1c0c6 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -36,7 +36,7 @@ python3.pkgs.buildPythonApplication {
     aiofiles
     aiohttp
     aiohttp-cors
-    async_generator
+    async-generator
     distro
     importlib-resources
     jinja2
diff --git a/pkgs/development/python-modules/aiohttp/default.nix b/pkgs/development/python-modules/aiohttp/default.nix
index bfe6bc06199b..e2e2ebac9ae5 100644
--- a/pkgs/development/python-modules/aiohttp/default.nix
+++ b/pkgs/development/python-modules/aiohttp/default.nix
@@ -21,7 +21,7 @@
 , typing-extensions
 , idna-ssl
 # tests_require
-, async_generator
+, async-generator
 , freezegun
 , gunicorn
 , pytest-mock
@@ -80,7 +80,7 @@ buildPythonPackage rec {
 
   # NOTE: pytest-xdist cannot be added because it is flaky. See https://github.com/NixOS/nixpkgs/issues/230597 for more info.
   nativeCheckInputs = [
-    async_generator
+    async-generator
     freezegun
     gunicorn
     pytest-mock
diff --git a/pkgs/development/python-modules/asks/default.nix b/pkgs/development/python-modules/asks/default.nix
index 088e946c93d1..8be9a9b21160 100644
--- a/pkgs/development/python-modules/asks/default.nix
+++ b/pkgs/development/python-modules/asks/default.nix
@@ -3,7 +3,7 @@
 , pythonOlder
 , fetchFromGitHub
 , anyio
-, async_generator
+, async-generator
 , h11
 , curio
 , overly
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     anyio
-    async_generator
+    async-generator
     h11
   ];
 
diff --git a/pkgs/development/python-modules/async_generator/default.nix b/pkgs/development/python-modules/async-generator/default.nix
similarity index 88%
rename from pkgs/development/python-modules/async_generator/default.nix
rename to pkgs/development/python-modules/async-generator/default.nix
index e80fd914c19c..17014a410d4c 100644
--- a/pkgs/development/python-modules/async_generator/default.nix
+++ b/pkgs/development/python-modules/async-generator/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "async_generator";
     inherit version;
-    sha256 = "6ebb3d106c12920aaae42ccb6f787ef5eefdcdd166ea3d628fa8476abe712144";
+    hash = "sha256-brs9EGwSkgqq5CzLb3h+9e79zdFm6j1ij6hHar5xIUQ=";
   };
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/geopy/default.nix b/pkgs/development/python-modules/geopy/default.nix
index ca50920b188e..1ca084d999cd 100644
--- a/pkgs/development/python-modules/geopy/default.nix
+++ b/pkgs/development/python-modules/geopy/default.nix
@@ -1,5 +1,5 @@
 { lib
-, async_generator
+, async-generator
 , buildPythonPackage
 , docutils
 , fetchFromGitHub
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   ];
 
   nativeCheckInputs = [
-    async_generator
+    async-generator
     docutils
     pytestCheckHook
     pytz
diff --git a/pkgs/development/python-modules/jupyterhub/default.nix b/pkgs/development/python-modules/jupyterhub/default.nix
index 9dea973b042f..b1bb40ad70f7 100644
--- a/pkgs/development/python-modules/jupyterhub/default.nix
+++ b/pkgs/development/python-modules/jupyterhub/default.nix
@@ -5,7 +5,7 @@
 , fetchPypi
 , fetchzip
 , alembic
-, async_generator
+, async-generator
 , certipy
 , python-dateutil
 , entrypoints
@@ -113,7 +113,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     # https://github.com/jupyterhub/jupyterhub/blob/master/requirements.txt
     alembic
-    async_generator
+    async-generator
     certipy
     python-dateutil
     entrypoints
diff --git a/pkgs/development/python-modules/nbclient/default.nix b/pkgs/development/python-modules/nbclient/default.nix
index 6f0d85ff9203..6c386ee01854 100644
--- a/pkgs/development/python-modules/nbclient/default.nix
+++ b/pkgs/development/python-modules/nbclient/default.nix
@@ -1,4 +1,4 @@
-{ async_generator
+{ async-generator
 , buildPythonPackage
 , fetchFromGitHub
 , hatchling
@@ -36,7 +36,7 @@ let nbclient = buildPythonPackage rec {
   ];
 
   propagatedBuildInputs = [
-    async_generator
+    async-generator
     traitlets
     nbformat
     nest-asyncio
diff --git a/pkgs/development/python-modules/pyinsteon/default.nix b/pkgs/development/python-modules/pyinsteon/default.nix
index 22c044e68b81..1747fc677398 100644
--- a/pkgs/development/python-modules/pyinsteon/default.nix
+++ b/pkgs/development/python-modules/pyinsteon/default.nix
@@ -1,7 +1,7 @@
 { lib
 , aiofiles
 , aiohttp
-, async_generator
+, async-generator
 , buildPythonPackage
 , fetchFromGitHub
 , pypubsub
@@ -41,7 +41,7 @@ buildPythonPackage rec {
   ];
 
   nativeCheckInputs = [
-    async_generator
+    async-generator
     pytestCheckHook
   ];
 
diff --git a/pkgs/development/python-modules/pytest-trio/default.nix b/pkgs/development/python-modules/pytest-trio/default.nix
index e65e494a5409..36f31a0288c8 100644
--- a/pkgs/development/python-modules/pytest-trio/default.nix
+++ b/pkgs/development/python-modules/pytest-trio/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchFromGitHub, pythonOlder
-, trio, async_generator, hypothesis, outcome, pytest }:
+, trio, async-generator, hypothesis, outcome, pytest }:
 
 buildPythonPackage rec {
   pname = "pytest-trio";
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     trio
-    async_generator
+    async-generator
     outcome
   ];
 
diff --git a/pkgs/development/python-modules/trio/default.nix b/pkgs/development/python-modules/trio/default.nix
index 194dc3f71856..fb985e890a77 100644
--- a/pkgs/development/python-modules/trio/default.nix
+++ b/pkgs/development/python-modules/trio/default.nix
@@ -1,7 +1,7 @@
 { lib, buildPythonPackage, fetchPypi, pythonOlder
 , attrs
 , sortedcontainers
-, async_generator
+, async-generator
 , exceptiongroup
 , idna
 , outcome
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     attrs
     sortedcontainers
-    async_generator
+    async-generator
     idna
     outcome
     sniffio
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 5759fc0ba120..9a2fc3586909 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -45,6 +45,7 @@ mapAliases ({
   apache-airflow = throw "apache-airflow has been moved out of pythonPackages and is available as a standalone package"; # added 2023-06-05
   argon2_cffi = argon2-cffi; # added 2022-05-09
   APScheduler = apscheduler; # added 2023-02-19
+  async_generator = async-generator; # added 2023-08-08
   async_stagger = async-stagger; # added 2023-08-08
   asyncio-nats-client = nats-py; # added 2022-02-08
   awkward0 = throw "awkward0 has been removed, use awkward instead"; # added 2022-12-13
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b4757bf750eb..e61c411a31e0 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -736,10 +736,10 @@ self: super: with self; {
 
   asyauth = callPackage ../development/python-modules/asyauth { };
 
-  async_generator = callPackage ../development/python-modules/async_generator { };
-
   async-dns = callPackage ../development/python-modules/async-dns { };
 
+  async-generator = callPackage ../development/python-modules/async-generator { };
+
   async-interrupt = callPackage ../development/python-modules/async-interrupt { };
 
   async-lru = callPackage ../development/python-modules/async-lru { };