diff --git a/pkgs/development/python-modules/pylsl/default.nix b/pkgs/development/python-modules/pylsl/default.nix
index 90fe12d0c1d9..8def5f08ee6e 100644
--- a/pkgs/development/python-modules/pylsl/default.nix
+++ b/pkgs/development/python-modules/pylsl/default.nix
@@ -12,14 +12,14 @@
 
 buildPythonPackage rec {
   pname = "pylsl";
-  version = "1.18.1";
+  version = "1.18.3.b1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "labstreaminglayer";
     repo = "pylsl";
     tag = "v${version}";
-    hash = "sha256-H/ALvRtgv1Ms9VeTJvDRCpg0Q+/4Xjx/NS4whOGmtU8=";
+    hash = "sha256-AVnRkkzAiPGcnnDL7ZxsnY7R76DcqPcG1M5Fg4ZRSX0=";
   };
 
   postPatch = ''