diff --git a/gnu/packages/prolog.scm b/gnu/packages/prolog.scm
index 70ceb2a4383..45d6f28d5bd 100644
--- a/gnu/packages/prolog.scm
+++ b/gnu/packages/prolog.scm
@@ -185,7 +185,7 @@ it.")
 (define-public trealla
   (package
     (name "trealla")
-    (version "2.78.17")
+    (version "2.78.20")
     (source
      (origin
        (method git-fetch)
@@ -194,7 +194,7 @@ it.")
          (url "https://github.com/trealla-prolog/trealla")
          (commit (string-append "v" version))))
        (sha256
-        (base32 "1y0idn7896wb58dwksfi9gxyilqcbh9c8z89k2fa1ykhbc7rd7fn"))
+        (base32 "1ld4qpd6mzggnb226fm01ldv21w07izb9xp339cd98f5hz63wybw"))
        (file-name (git-file-name name version))))
     (build-system gnu-build-system)
     (native-inputs