1 files changed, 1 insertions, 1 deletions
diff --git a/packages/sol-resolver/src/resolvers/name_resolver.ts b/packages/sol-resolver/src/resolvers/name_resolver.ts
index bcd98615f..d6ac6a499 100644
--- a/packages/sol-resolver/src/resolvers/name_resolver.ts
+++ b/packages/sol-resolver/src/resolvers/name_resolver.ts
@@ -8,7 +8,7 @@ import { EnumerableResolver } from './enumerable_resolver';
 const SOLIDITY_FILE_EXTENSION = '.sol';
 
 export class NameResolver extends EnumerableResolver {
-    private _contractsDir: string;
+    private readonly _contractsDir: string;
     constructor(contractsDir: string) {
         super();
         this._contractsDir = contractsDir;