diff --git a/pkgs/development/python-modules/datasette/default.nix b/pkgs/development/python-modules/datasette/default.nix
index 48de7e86b92e..828976f0e9fb 100644
--- a/pkgs/development/python-modules/datasette/default.nix
+++ b/pkgs/development/python-modules/datasette/default.nix
@@ -3,7 +3,6 @@
 , fetchFromGitHub
 , click
 , click-default-group
-, sanic
 , jinja2
 , hupper
 , pint
@@ -14,17 +13,20 @@
 , black
 , aiohttp
 , beautifulsoup4
+, uvicorn
+, asgiref
+, aiofiles
 }:
 
 buildPythonPackage rec {
   pname = "datasette";
-  version = "0.28";
+  version = "0.29.3";
 
   src = fetchFromGitHub {
     owner = "simonw";
     repo = "datasette";
     rev = version;
-    sha256 = "1m2s03gyq0ghjc3s0b5snpinisddywpgii2f0zqa3v4ljmzanx7h";
+    sha256 = "0cib7pd4z240ncck0pskzvizblhwkr42fsjpd719wdxy4scs7yqa";
   };
 
   buildInputs = [ pytestrunner ];
@@ -32,11 +34,12 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     click
     click-default-group
-    sanic
     jinja2
     hupper
     pint
     pluggy
+    uvicorn
+    aiofiles
   ];
 
   checkInputs = [
@@ -45,6 +48,7 @@ buildPythonPackage rec {
     aiohttp
     beautifulsoup4
     black
+    asgiref
   ];
 
   postConfigure = ''
@@ -52,8 +56,9 @@ buildPythonPackage rec {
       --replace "click-default-group==1.2" "click-default-group" \
       --replace "Sanic==0.7.0" "Sanic" \
       --replace "hupper==1.0" "hupper" \
-      --replace "pint==0.8.1" "pint" \
-      --replace "Jinja2==2.10.1" "Jinja2"
+      --replace "pint~=0.8.1" "pint" \
+      --replace "Jinja2==2.10.1" "Jinja2" \
+      --replace "uvicorn~=0.8.4" "uvicorn"
   '';
 
   # many tests require network access