diff --git a/var/spack/repos/builtin/packages/slepc/package.py b/var/spack/repos/builtin/packages/slepc/package.py
index 2c72af0342c69b4a38b0c90557c776462647b3f4..6d3bb5dba22b7425bdd537257b3226133f33af36 100644
--- a/var/spack/repos/builtin/packages/slepc/package.py
+++ b/var/spack/repos/builtin/packages/slepc/package.py
@@ -11,8 +11,8 @@
 class Slepc(Package):
     """Scalable Library for Eigenvalue Problem Computations."""
 
-    homepage = "http://slepc.upv.es"
-    url      = "http://slepc.upv.es/download/distrib/slepc-3.6.2.tar.gz"
+    homepage = "https://slepc.upv.es"
+    url      = "https://slepc.upv.es/download/distrib/slepc-3.6.2.tar.gz"
     git      = "https://gitlab.com/slepc/slepc.git"
 
     maintainers = ['joseeroman', 'balay']