diff --git a/nix/build-all.py b/nix/build-all.py
index 2a4318dc35..133f0c1d46 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -149,7 +149,7 @@ EIGEN_VERSION = "3.4.0"
 PCRE_VERSION = "8.41"
 PCRE2_VERSION = "10.32"
 LIBXML2_VERSION = "2.13.8"
-SWIG_VERSION = "4.1.0"
+SWIG_VERSION = "4.2.1"
 OPENCOLLADA_VERSION = "v1.6.68"
 HDF5_VERSION = "1.13.1"
 
diff --git a/win/build-deps.cmd b/win/build-deps.cmd
index 407a55dccb..d4a1a21637 100644
--- a/win/build-deps.cmd
+++ b/win/build-deps.cmd
@@ -574,7 +574,7 @@ IF NOT %ERRORLEVEL%==0 GOTO :Error
 
 :SWIG
 set DEPENDENCY_NAME=SWIG
-set SWIG_VERSION=4.1.0
+set SWIG_VERSION=4.2.1
 set DEPENDENCY_DIR=%DEPS_DIR%\swig-%SWIG_VERSION%
 set DEPENDENCY_INSTALL_DIR=%INSTALL_DIR%\swig-%SWIG_VERSION%
 echo SWIG_INSTALL_DIR=%DEPENDENCY_INSTALL_DIR%>>"%~dp0\%BUILD_DEPS_CACHE_PATH%"