diff --git a/package/isl/isl.mk b/package/isl/isl.mk
index 3abd6640cb..df57c83f55 100644
--- a/package/isl/isl.mk
+++ b/package/isl/isl.mk
@@ -6,7 +6,7 @@
 
 ISL_VERSION = 0.23
 ISL_SOURCE = isl-$(ISL_VERSION).tar.xz
-ISL_SITE = http://isl.gforge.inria.fr
+ISL_SITE = https://libisl.sourceforge.io
 ISL_LICENSE = MIT
 ISL_LICENSE_FILES = LICENSE
 HOST_ISL_DEPENDENCIES = host-gmp