diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index db8004a..32ca42a 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -122,7 +122,7 @@
         ],
     ),
     "fmtlib/fmt": PackageDef(
-        rev="7.1.3",
+        rev="8.1.1",
         build_type="cmake",
         config_flags=[
             "-DFMT_DOC=OFF",