diff --git a/dcgmbuild/aarch64.config b/dcgmbuild/aarch64.config
index 112ec4ea..af669ff0 100644
--- a/dcgmbuild/aarch64.config
+++ b/dcgmbuild/aarch64.config
@@ -724,7 +724,7 @@ CT_ISL_V_0_24=y
 # CT_ISL_V_0_16 is not set
 # CT_ISL_V_0_15 is not set
 CT_ISL_VERSION="0.24"
-CT_ISL_MIRRORS="http://isl.gforge.inria.fr"
+CT_ISL_MIRRORS="https://libisl.sourceforge.io"
 CT_ISL_ARCHIVE_FILENAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_DIRNAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_FORMATS=".tar.xz .tar.bz2 .tar.gz"
diff --git a/dcgmbuild/ppc64le.config b/dcgmbuild/ppc64le.config
index 278312aa..f5437dbb 100644
--- a/dcgmbuild/ppc64le.config
+++ b/dcgmbuild/ppc64le.config
@@ -722,7 +722,7 @@ CT_ISL_V_0_24=y
 # CT_ISL_V_0_16 is not set
 # CT_ISL_V_0_15 is not set
 CT_ISL_VERSION="0.24"
-CT_ISL_MIRRORS="http://isl.gforge.inria.fr"
+CT_ISL_MIRRORS="https://libisl.sourceforge.io"
 CT_ISL_ARCHIVE_FILENAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_DIRNAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_FORMATS=".tar.xz .tar.bz2 .tar.gz"
diff --git a/dcgmbuild/x86_64.config b/dcgmbuild/x86_64.config
index 4388b6f6..08bfde0b 100644
--- a/dcgmbuild/x86_64.config
+++ b/dcgmbuild/x86_64.config
@@ -712,7 +712,7 @@ CT_ISL_V_0_24=y
 # CT_ISL_V_0_16 is not set
 # CT_ISL_V_0_15 is not set
 CT_ISL_VERSION="0.24"
-CT_ISL_MIRRORS="http://isl.gforge.inria.fr"
+CT_ISL_MIRRORS="https://libisl.sourceforge.io"
 CT_ISL_ARCHIVE_FILENAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_DIRNAME="@{pkg_name}-@{version}"
 CT_ISL_ARCHIVE_FORMATS=".tar.xz .tar.bz2 .tar.gz"