1 files changed, 1 insertions, 1 deletions
diff --git a/packages/sol-resolver/src/resolvers/relative_fs_resolver.ts b/packages/sol-resolver/src/resolvers/relative_fs_resolver.ts
index 2317ede83..77103b8c1 100644
--- a/packages/sol-resolver/src/resolvers/relative_fs_resolver.ts
+++ b/packages/sol-resolver/src/resolvers/relative_fs_resolver.ts
@@ -6,7 +6,7 @@ import { ContractSource } from '../types';
 import { Resolver } from './resolver';
 
 export class RelativeFSResolver extends Resolver {
-    private _contractsDir: string;
+    private readonly _contractsDir: string;
     constructor(contractsDir: string) {
         super();
         this._contractsDir = contractsDir;