diff --git a/packages.ent b/packages.ent
index be58de1b9..089cd95cf 100644
--- a/packages.ent
+++ b/packages.ent
@@ -349,12 +349,13 @@
 <!ENTITY iproute2-fin-du "17 MB">
 <!ENTITY iproute2-fin-sbu "0.1 SBU">
 
-<!ENTITY isl-version "0.24">
-<!ENTITY isl-size "2.1 MB">
+<!ENTITY isl-version "0.26">
+<!ENTITY isl-size "1.9 MB">
 <!-- ENTITY isl-url "http://isl.gforge.inria.fr/isl-&isl-version;.tar.xz" -->
-<!ENTITY isl-url "https://gcc.gnu.org/pub/gcc/infrastructure/isl-&isl-version;.tar.bz2">
-<!ENTITY isl-md5 "dd2f7b78e118c25bd96134a52aae7f4d">
-<!ENTITY isl-home "http://isl.gforge.inria.fr/">
+<!-- ENTITY isl-url "https://gcc.gnu.org/pub/gcc/infrastructure/isl-&isl-version;.tar.bz2" -->
+<!ENTITY isl-url "https://libisl.sourceforge.io/isl-&isl-version;.tar.xz">
+<!ENTITY isl-md5 "f2b56e8da688eba89838d414470da85f">
+<!ENTITY isl-home "http://libisl.sourceforge.io/">
 <!ENTITY isl-fin-du "20 MB">
 <!ENTITY isl-fin-sbu "0.1 SBU">