diff --git a/rebar.config b/rebar.config
index 301ceb7..855ab1b 100644
--- a/rebar.config
+++ b/rebar.config
@@ -3,7 +3,7 @@
 {plugins, [rebar3_hex]}.
 {deps, [
          {gmserialization, {git, "https://git.qpq.swiss/QPQ-AG/gmserialization.git",
-                            {ref, "c403fa89a1"}}}
+                            {ref, "0d77ca0388"}}}
        ]}.
 
 {xref_checks, [undefined_function_calls, undefined_functions,
diff --git a/rebar.lock b/rebar.lock
index c6ffca2..6432e92 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -8,5 +8,5 @@
   1},
  {<<"gmserialization">>,
   {git,"https://git.qpq.swiss/QPQ-AG/gmserialization.git",
-       {ref,"c403fa89a101273fba46c15589e3838cfa12dc25"}},
+       {ref,"0d77ca038811efdfe6d7768ee1dd59e51d3e5fba"}},
   0}].