diff --git a/pkgs/development/libraries/symengine/default.nix b/pkgs/development/libraries/symengine/default.nix
index 01ec3a4fba29..92ecf3e494e1 100644
--- a/pkgs/development/libraries/symengine/default.nix
+++ b/pkgs/development/libraries/symengine/default.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "symengine";
-  version = "0.7.0";
+  version = "0.8.1";
 
   src = fetchFromGitHub {
     owner = "symengine";
     repo = "symengine";
     rev = "v${version}";
-    sha256 = "sha256-aoitTT9fwTIs3ovfqQjKGgrU+kT5mj+vDHt5lg49JHU=";
+    sha256 = "sha256-HTDOSgdWo9MWmKeXOkOHAJjgvihUAkSXoYTeMz9XXLI=";
   };
 
   nativeBuildInputs = [ cmake ];
diff --git a/pkgs/development/python-modules/symengine/default.nix b/pkgs/development/python-modules/symengine/default.nix
index c20f2338fa2a..673e2682660b 100644
--- a/pkgs/development/python-modules/symengine/default.nix
+++ b/pkgs/development/python-modules/symengine/default.nix
@@ -11,18 +11,19 @@
 
 buildPythonPackage rec {
   pname = "symengine";
-  version = "0.7.2";
+  version = "0.8.1";
 
   src = fetchFromGitHub {
     owner = "symengine";
     repo = "symengine.py";
     rev = "v${version}";
-    sha256 = "1xaclpvk7m6mbp70zrsvi3blz4v89pbsf7b6rpmx5903m6kxqr4m";
+    sha256 = "0yyi3w03fk19i32jmns1baq3rpmf7xfykzkivc7dmnxmjmxvq2gr";
   };
 
   postConfigure = ''
     substituteInPlace setup.py \
-      --replace "\"cmake\"" "\"${cmake}/bin/cmake\""
+      --replace "\"cmake\"" "\"${cmake}/bin/cmake\"" \
+      --replace "'cython>=0.29.24'" "'cython'"
 
     substituteInPlace cmake/FindCython.cmake \
       --replace "SET(CYTHON_BIN cython" "SET(CYTHON_BIN ${cython}/bin/cython"