diff --git a/pkgs/by-name/mu/mupdf/package.nix b/pkgs/by-name/mu/mupdf/package.nix
index b0bc9b7bcf05..93839bb44023 100644
--- a/pkgs/by-name/mu/mupdf/package.nix
+++ b/pkgs/by-name/mu/mupdf/package.nix
@@ -62,12 +62,12 @@ let
 in
 
 stdenv.mkDerivation rec {
-  version = "1.24.11";
+  version = "1.25.2";
   pname = "mupdf";
 
   src = fetchurl {
     url = "https://mupdf.com/downloads/archive/${pname}-${version}-source.tar.gz";
-    hash = "sha256-GRInuWd19nBe99lVEYdRGTK1GSc7NFNaMxSRz32YFj8=";
+    hash = "sha256-Nsz2peaR4Yis+NtumNCL8F8nu0zjBDLcFfx20ympLU0=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pymupdf/default.nix b/pkgs/development/python-modules/pymupdf/default.nix
index 626f444db883..b73c6bd05998 100644
--- a/pkgs/development/python-modules/pymupdf/default.nix
+++ b/pkgs/development/python-modules/pymupdf/default.nix
@@ -41,7 +41,7 @@ let
 in
 buildPythonPackage rec {
   pname = "pymupdf";
-  version = "1.24.14";
+  version = "1.25.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -50,7 +50,7 @@ buildPythonPackage rec {
     owner = "pymupdf";
     repo = "PyMuPDF";
     tag = version;
-    hash = "sha256-M7Ca3nqnqeClp4MGJqTAVGZhAGRniregjRrjtAhRkBc=";
+    hash = "sha256-kdu8CuQJ5+h8+PS66acWEfcttgALiD+JBoWWyGtjBzs=";
   };
 
   # swig is not wrapped as Python package
@@ -123,6 +123,11 @@ buildPythonPackage rec {
 
   preCheck = ''
     export PATH="$out/bin:$PATH";
+
+    # Fixes at least one test; see:
+    # * <https://github.com/pymupdf/PyMuPDF/blob/refs/tags/1.25.1/scripts/sysinstall.py#L390>
+    # * <https://github.com/pymupdf/PyMuPDF/blob/refs/tags/1.25.1/tests/test_pixmap.py#L425-L428>
+    export PYMUPDF_SYSINSTALL_TEST=1
   '';
 
   meta = {