diff --git a/paket.lock b/paket.lock
index 6b7123035..3e6fcf465 100644
--- a/paket.lock
+++ b/paket.lock
@@ -23,7 +23,7 @@ NUGET
     Expecto (9.0.4)
       FSharp.Core (>= 4.6)
       Mono.Cecil (>= 0.11.3)
-    Fantomas.Client (0.3.4)
+    Fantomas.Client (0.4)
       FSharp.Core (>= 5.0)
       StreamJsonRpc (>= 2.8.28)
     FParsec (1.1.1) - restriction: || (== net5.0) (&& (== netstandard2.0) (>= net5.0))