diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index 0f03c52704..2f434a87e6 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -2228,14 +2228,14 @@ (define-public r-hardyweinberg
 (define-public r-sm
   (package
     (name "r-sm")
-    (version "2.2-5.5")
+    (version "2.2-5.6")
     (source
      (origin
        (method url-fetch)
        (uri (cran-uri "sm" version))
        (sha256
         (base32
-         "1rw2mxygxsmk8mn4wag1ppjgzk0rlvh6zd8q02qrhjrn9jhi5qj3"))))
+         "0c4whcx879gb4lwvqnzxl5n9xgpcqh2c54ip9ami3mwfprzcv45q"))))
     (build-system r-build-system)
     (native-inputs `(("gfortran" ,gfortran)))
     (home-page "http://www.stats.gla.ac.uk/~adrian/sm/")