diff --git a/pkgs/development/tools/backblaze-b2/default.nix b/pkgs/development/tools/backblaze-b2/default.nix
index a38acbd53c94..a062d18096dc 100644
--- a/pkgs/development/tools/backblaze-b2/default.nix
+++ b/pkgs/development/tools/backblaze-b2/default.nix
@@ -2,15 +2,17 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "backblaze-b2";
-  version = "3.6.0";
+  version = "3.7.0";
 
   src = python3Packages.fetchPypi {
     inherit version;
     pname = "b2";
-    sha256 = "sha256-qHnnUTSLY1yncqIjG+IMLoNauvgwU04qsvH7dZZ8AlI=";
+    sha256 = "sha256-sW6gaZWUh3WX+0+qHRlQ4gZzKU4bL8ePPNKWo9rdF84=";
   };
 
   postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace 'phx-class-registry==4.0.5' 'phx-class-registry'
     substituteInPlace requirements.txt \
       --replace 'tabulate==0.8.10' 'tabulate'
     substituteInPlace setup.py \