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-rw-r--r--gnu/packages/maths.scm6
1 files changed, 3 insertions, 3 deletions
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index fe9d59b69a..6f75fba879 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -4320,9 +4320,9 @@ reduction.")
     (version "201908.0")
     (source (origin
               (method url-fetch)
-              (uri (string-append "http://www.mcrl2.org/download/devel/mcrl2-"
-                                  version
-                                  ".tar.gz"))
+              (uri (string-append
+                    "https://www.mcrl2.org/download/release/mcrl2-"
+                    version ".tar.gz"))
               (sha256
                (base32
                 "1i4xgl2d5fgiz1mwi50cyfkrrcpm8nxfayfjgmhq7chs58wlhfsz"))))