diff --git a/pkgs/applications/science/misc/snakemake/default.nix b/pkgs/applications/science/misc/snakemake/default.nix
index 5ecde8396069..5270cac57823 100644
--- a/pkgs/applications/science/misc/snakemake/default.nix
+++ b/pkgs/applications/science/misc/snakemake/default.nix
@@ -2,7 +2,7 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "snakemake";
-  version = "6.5.3";
+  version = "6.6.1";
 
   propagatedBuildInputs = with python3Packages; [
     appdirs
@@ -12,10 +12,13 @@ python3Packages.buildPythonApplication rec {
     docutils
     filelock
     GitPython
+    jinja2
     jsonschema
     nbformat
+    networkx
     psutil
     pulp
+    pygraphviz
     pyyaml
     ratelimiter
     requests
@@ -28,7 +31,7 @@ python3Packages.buildPythonApplication rec {
 
   src = python3Packages.fetchPypi {
     inherit pname version;
-    sha256 = "a06839346425c74542e6e2e6047db3133cd747ef89e1ebd87dad1fbba041f62d";
+    sha256 = "91637a801342f3bc349c033b284fef7c0201b4e5e29d5650cb6c7f69096d4184";
   };
 
   doCheck = false; # Tests depend on Google Cloud credentials at ${HOME}/gcloud-service-key.json