2 files changed, 2 insertions, 2 deletions
diff --git a/README.md b/README.md
index 77a16a6..38f1c42 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 * [GMP](https://gmplib.org/) 6.1.2
 * [MPFR](http://www.mpfr.org/) 4.0.2
 * [MPC](http://www.multiprecision.org/mpc/) 1.1.0
-* [isl](http://isl.gforge.inria.fr/) 0.20
+* [isl](http://isl.gforge.inria.fr/) 0.21
 
 ## Platforms
 mingw-w64-build should run on Ubuntu, Cygwin, macOS (with Homebrew), and other Bash based shells.
diff --git a/mingw-w64-build b/mingw-w64-build
index 3fc0a87..1b86662 100755
--- a/mingw-w64-build
+++ b/mingw-w64-build
@@ -23,7 +23,7 @@ v_gcc="8svn"
 v_gmp="6.1.2"
 v_mpfr="4.0.2"
 v_mpc="1.1.0"
-v_isl="0.20"
+v_isl="0.21"
 
 show_help()
 {