diff --git a/tools/isl/Makefile b/tools/isl/Makefile
index 481c29634e..d909bb50af 100644
--- a/tools/isl/Makefile
+++ b/tools/isl/Makefile
@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=isl
-PKG_VERSION:=0.27
+PKG_VERSION:=0.28
 
 PKG_SOURCE_URL:=https://libisl.sourceforge.io/
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_HASH:=7a1a3f04d57c7c72fee5a6148cd3b02b05db6a6dd9a58def7bdc00972a6301c3
+PKG_HASH:=318549dd36989046da2b0feaea7fe5575c4448c28c0b97d3117403a88988e756
 
 HOST_BUILD_PARALLEL:=1