diff --git a/gnu/packages/cmake.scm b/gnu/packages/cmake.scm
index 9b8ebde761..a58284ba17 100644
--- a/gnu/packages/cmake.scm
+++ b/gnu/packages/cmake.scm
@@ -39,12 +39,12 @@
     (version "3.3.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append
-                   "http://www.cmake.org/files/v"
-                   (version-major+minor version)
-                   "/cmake-" version ".tar.gz"))
+             (uri (string-append "https://www.cmake.org/files/v"
+                                 (version-major+minor version)
+                                 "/cmake-" version ".tar.gz"))
              (sha256
-              (base32 "08pwy9ip9cgwgynhn5vrjw8drw29gijy1rmziq22n65zds6ifnp7"))
+              (base32
+               "08pwy9ip9cgwgynhn5vrjw8drw29gijy1rmziq22n65zds6ifnp7"))
              (patches (list (search-patch "cmake-fix-tests.patch")))))
     (build-system gnu-build-system)
     (arguments