diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index 291a367a2f..ffb2f87836 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -4106,7 +4106,7 @@ as equations, scalars, vectors, and matrices.")
 (define-public z3
   (package
     (name "z3")
-    (version "4.8.4")
+    (version "4.8.6")
     (home-page "https://github.com/Z3Prover/z3")
     (source (origin
               (method git-fetch)
@@ -4115,7 +4115,7 @@ as equations, scalars, vectors, and matrices.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "014igqm5vwswz0yhz0cdxsj3a6dh7i79hvhgc3jmmmz3z0xm1gyn"))))
+                "1sywcqj5y8yp28m4cdvzsgw74kd6zr1s3y1x17ky8pr9prvpvl6x"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases