diff --git a/action.yml b/action.yml
index 4ab36ef..e3d1213 100644
--- a/action.yml
+++ b/action.yml
@@ -265,7 +265,7 @@ runs:
 
         if [[ "${{ inputs.dynamic-space-size }}" != "" ]]; then
             echo ::group::Changing Dynamic Space Size in Roswell Config
-            echo "dynamic-space-size    0       ${{ inputs.dynamic-space-size }}" >> ~/.roswell/config 
+            ros config set dynamic-space-size ${{ inputs.dynamic-space-size }}
         fi
 
         echo ::endgroup::
diff --git a/changelog.lisp b/changelog.lisp
index 1d74655..89be45f 100644
--- a/changelog.lisp
+++ b/changelog.lisp
@@ -11,6 +11,8 @@
                               "SBCL"
                               "HOME"))
 
+  (4.2.1 2024-12-15
+         "Fixed the way how we set dynamic-space-size.")
   (4.2.0 2024-12-14
          "Input variable `dynamic-space-size` was added. It can be used to default set memory size for SBCL.")
   (4.1.0 2024-05-17