diff --git a/modules/data/src/effects/entity-cache-effects.ts b/modules/data/src/effects/entity-cache-effects.ts
index 577f5148ea..688483a1f0 100644
--- a/modules/data/src/effects/entity-cache-effects.ts
+++ b/modules/data/src/effects/entity-cache-effects.ts
@@ -129,7 +129,9 @@ export class EntityCacheEffects {
       // Emit which ever gets there first; the other observable is terminated.
       return race(c, d);
     } catch (err) {
-      return this.handleSaveEntitiesError$(action)(err);
+      return this.handleSaveEntitiesError$(action)(
+        err as DataServiceError | Error
+      );
     }
   }
 
diff --git a/modules/data/src/effects/entity-effects.ts b/modules/data/src/effects/entity-effects.ts
index 0617203019..a1a4e687bb 100644
--- a/modules/data/src/effects/entity-effects.ts
+++ b/modules/data/src/effects/entity-effects.ts
@@ -102,8 +102,8 @@ export class EntityEffects {
 
       // Emit which ever gets there first; the other observable is terminated.
       return race(c, d);
-    } catch (err) {
-      return this.handleError$(action)(err);
+    } catch (err: unknown) {
+      return this.handleError$(action)(err as Error);
     }
   }
 
@@ -170,7 +170,7 @@ export class EntityEffects {
     // ensure observable takes some time,
     // as app likely assumes asynchronous response.
     return (error: Error) =>
-      of(this.resultHandler.handleError(action)(error)).pipe(
+      of(this.resultHandler.handleError(action)(error as Error)).pipe(
         delay(this.responseDelay, this.scheduler || asyncScheduler)
       );
   }
diff --git a/modules/data/src/reducers/entity-cache-reducer.ts b/modules/data/src/reducers/entity-cache-reducer.ts
index 5f8c49d8b4..135909dfb1 100644
--- a/modules/data/src/reducers/entity-cache-reducer.ts
+++ b/modules/data/src/reducers/entity-cache-reducer.ts
@@ -213,13 +213,8 @@ export class EntityCacheReducerFactory {
     entityCache: EntityCache,
     action: SaveEntities
   ) {
-    const {
-      changeSet,
-      correlationId,
-      isOptimistic,
-      mergeStrategy,
-      tag,
-    } = action.payload;
+    const { changeSet, correlationId, isOptimistic, mergeStrategy, tag } =
+      action.payload;
 
     try {
       changeSet.changes.forEach((item) => {
@@ -243,8 +238,8 @@ export class EntityCacheReducerFactory {
           throw act.payload.error;
         }
       });
-    } catch (error) {
-      action.payload.error = error;
+    } catch (error: unknown) {
+      action.payload.error = error as Error;
     }
 
     return entityCache;
@@ -293,13 +288,8 @@ export class EntityCacheReducerFactory {
     entityCache: EntityCache,
     action: SaveEntitiesSuccess
   ) {
-    const {
-      changeSet,
-      correlationId,
-      isOptimistic,
-      mergeStrategy,
-      tag,
-    } = action.payload;
+    const { changeSet, correlationId, isOptimistic, mergeStrategy, tag } =
+      action.payload;
 
     changeSet.changes.forEach((item) => {
       const entityName = item.entityName;
@@ -344,18 +334,17 @@ export class EntityCacheReducerFactory {
   ) {
     const entityName = action.payload.entityName;
     const collection = cache[entityName];
-    const reducer = this.entityCollectionReducerRegistry.getOrCreateReducer(
-      entityName
-    );
+    const reducer =
+      this.entityCollectionReducerRegistry.getOrCreateReducer(entityName);
 
     let newCollection: EntityCollection;
     try {
       newCollection = collection
         ? reducer(collection, action)
         : reducer(this.entityCollectionCreator.create(entityName), action);
-    } catch (error) {
+    } catch (error: unknown) {
       this.logger.error(error);
-      action.payload.error = error;
+      action.payload.error = error as Error;
     }
 
     return action.payload.error || collection === newCollection!