diff --git a/gnu/packages/statistics.scm b/gnu/packages/statistics.scm
index 51c41bb0b8..1ad0cb12ec 100644
--- a/gnu/packages/statistics.scm
+++ b/gnu/packages/statistics.scm
@@ -2129,7 +2129,7 @@ (define-public python-hdmedians
 (define-public python-arviz
   (package
     (name "python-arviz")
-    (version "0.15.1")
+    (version "0.16.1")
     (source (origin
               (method git-fetch)        ; PyPI misses some test files
               (uri (git-reference
@@ -2138,7 +2138,7 @@ (define-public python-arviz
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "0nqr4v927r9kc50z7rwlk2m8nw3dnnmmwmwcfijzd93gbg53wc4f"))))
+                "19phaqbpls82300z7ghicrldjxyjq4ilmmwsmd9zkl8c7ld5cb4j"))))
     (build-system pyproject-build-system)
     (arguments
      ;; FIXME: matplotlib tests fail because of the "--save" test flag.