diff --git a/unit-conversion/src/features/number-input-field/numberInputFieldSlice.js b/unit-conversion/src/features/number-input-field/numberInputFieldSlice.js
index a38790224e5a22c7c3591dabc694a8489946fe65..fdb6d846fd53777355672575776c3afe92d76a26 100644
--- a/unit-conversion/src/features/number-input-field/numberInputFieldSlice.js
+++ b/unit-conversion/src/features/number-input-field/numberInputFieldSlice.js
@@ -8,10 +8,7 @@ const numberInputFieldSlice = createSlice({
   reducers: {
     setNumberOfUnits: (state, action) => {
       const numToConvert = action.payload;
-      return {
-        ...state,
-        numberToConvert: numToConvert,
-      };
+      state.numberToConvert = numToConvert;
     },
   },
 });
diff --git a/unit-conversion/src/features/unit-selector/unitSelectorSlice.js b/unit-conversion/src/features/unit-selector/unitSelectorSlice.js
index f8e6d30dedf3eacac9c9707f7370b5ec137e2cd4..341d9b956569d3689f3d9f19f515e99e004be30d 100644
--- a/unit-conversion/src/features/unit-selector/unitSelectorSlice.js
+++ b/unit-conversion/src/features/unit-selector/unitSelectorSlice.js
@@ -10,17 +10,11 @@ const unitSelectorSlice = createSlice({
     // The action payload should have the unit to switch to with the in or out
     setCurrentInputUnit: (state, action) => {
       const newUnit = action.payload;
-      return {
-        ...state,
-        currentInputUnit: newUnit,
-      };
+      state.currentInputUnit = newUnit;
     },
     setCurrentOutputUnit: (state, action) => {
       const newUnit = action.payload;
-      return {
-        ...state,
-        currentOutputUnit: newUnit,
-      };
+      state.currentOutputUnit = newUnit;
     },
   },
 });