diff --git a/webapp/packages/custom-connection-plugin/src/CustomConnectionService.ts b/webapp/packages/custom-connection-plugin/src/CustomConnectionService.ts
index 089b644847..bfb36e2ab8 100644
--- a/webapp/packages/custom-connection-plugin/src/CustomConnectionService.ts
+++ b/webapp/packages/custom-connection-plugin/src/CustomConnectionService.ts
@@ -26,7 +26,7 @@ export class CustomConnectionService {
       throw new Error('Driver properties loading failed');
     }
 
-    return response.driver[0].driverProperties;
+    return response.driver[0].driverProperties!;
   }
 
   async createConnectionAsync(config: ConnectionConfig): Promise<Connection> {
diff --git a/webapp/packages/data-viewer-plugin/src/DataViewerTableService.ts b/webapp/packages/data-viewer-plugin/src/DataViewerTableService.ts
index ba33359229..defbba75a5 100644
--- a/webapp/packages/data-viewer-plugin/src/DataViewerTableService.ts
+++ b/webapp/packages/data-viewer-plugin/src/DataViewerTableService.ts
@@ -83,12 +83,12 @@ export class DataViewerTableService {
       values: firstRow.values,
     });
 
-    const dataSet = response.result.results[0].resultSet; // we expect only one dataset for a table
+    const dataSet = response.result!.results[0].resultSet!; // we expect only one dataset for a table
 
     const result: IRequestDataResult = {
       rows: dataSet.rows!,
       columns: [], // not in use while saving data
-      duration: response.result.duration,
+      duration: response.result!.duration,
       isFullyLoaded: false, // not in use while saving data
       statusMessage: 'Saved successfully',
     };
@@ -119,14 +119,14 @@ export class DataViewerTableService {
         limit: count,
       },
     });
-    const dataSet = readDataFromContainer.results[0].resultSet; // we expect only one dataset for a table
+    const dataSet = readDataFromContainer!.results[0].resultSet!; // we expect only one dataset for a table
     data.resultId = dataSet.id; // server generates new resultId on each fetch
 
     const result: IRequestDataResult = {
       rows: dataSet.rows!,
-      columns: dataSet.columns,
-      duration: readDataFromContainer.duration,
-      statusMessage: readDataFromContainer.statusMessage || '',
+      columns: dataSet.columns!,
+      duration: readDataFromContainer!.duration,
+      statusMessage: readDataFromContainer!.statusMessage || '',
       isFullyLoaded: (dataSet.rows?.length || 0) < count,
     };
     return result;
diff --git a/webapp/packages/sql-editor/src/SqlDialectInfoService.ts b/webapp/packages/sql-editor/src/SqlDialectInfoService.ts
index 0941d88611..74b17dd07a 100644
--- a/webapp/packages/sql-editor/src/SqlDialectInfoService.ts
+++ b/webapp/packages/sql-editor/src/SqlDialectInfoService.ts
@@ -30,7 +30,7 @@ export class SqlDialectInfoService {
     if (!this.dialectInfo.has(connectionId)) {
       try {
         const result = await this.graphQLService.gql.querySqlDialectInfo({ connectionId });
-        this.dialectInfo.set(connectionId, result.dialect);
+        this.dialectInfo.set(connectionId, result.dialect!);
       } catch (error) {
         this.notificationService.logException(error, 'Failed to load SqlDialectInfo');
       }
diff --git a/webapp/packages/sql-editor/src/SqlResultTabs/SqlResultService.ts b/webapp/packages/sql-editor/src/SqlResultTabs/SqlResultService.ts
index fcfca55351..0f466f4cb3 100644
--- a/webapp/packages/sql-editor/src/SqlResultTabs/SqlResultService.ts
+++ b/webapp/packages/sql-editor/src/SqlResultTabs/SqlResultService.ts
@@ -39,7 +39,7 @@ export class SqlResultService {
         limit: count,
       },
     });
-    return response.result;
+    return response.result!;
   }
 
   asyncSqlQuery(sqlQueryParams: ISqlQueryParams,
@@ -65,7 +65,7 @@ export class SqlResultService {
       values: firstRow.values,
     });
 
-    return response.result;
+    return response.result!;
   }
 
   sqlExecuteInfoToData(result: SqlExecuteInfo, indexInResultSet: number, count?: number): IRequestDataResult {