diff --git a/README.md b/README.md
index 86af5ee..0b1c2fe 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ jobs:
 
 This action will automatically install the appropriate toolchain with `rustup` by inspecting the
 `RUSTUP_TOOLCHAIN` environment variable or the `rust-toolchain.toml` (preferred) or `rust-toolchain`
-configuration files. If no toolchain found, will default to `stable`.
+configuration files. To specify the location of the toolchain configuration files you can use `rust-toolchain-file` option. If no toolchain found, will default to `stable`.
 
 ```toml
 # rust-toolchain.toml
diff --git a/action.yml b/action.yml
index 8a52c54..6d0238e 100644
--- a/action.yml
+++ b/action.yml
@@ -9,6 +9,8 @@ inputs:
   cache:
     description: 'Toggle caching of ~/.cargo/registry and /target/debug directories.'
     default: true
+  rust-toolchain-file:
+    description: 'Path to a rust-toolchain file to install.'
   channel:
     description: 'Toolchain specification/channel to install.'
   components:
diff --git a/src/rust.ts b/src/rust.ts
index a2a2459..e80d628 100644
--- a/src/rust.ts
+++ b/src/rust.ts
@@ -94,17 +94,27 @@ export function detectToolchain(): Toolchain {
 		});
 	} else {
 		core.info('Loading rust-toolchain.toml or rust-toolchain file');
+    const toolchainFile = core.getInput('rust-toolchain-file');
 
-		for (const configName of ['rust-toolchain.toml', 'rust-toolchain']) {
-			const configPath = path.join(process.cwd(), configName);
+    if (toolchainFile) {
+      if (fs.existsSync(toolchainFile)) {
+        Object.assign(toolchain, parseConfig(toolchainFile));
+      } else {
+        core.setFailed('Not found toolchain config file');
+        throw new Error('Not found toolchain config file');
+      }
+    } else {
+      for (const configName of ['rust-toolchain.toml', 'rust-toolchain']) {
+        const configPath = path.join(process.cwd(), configName);
 
-			if (fs.existsSync(configPath)) {
-				core.debug(`Found ${configName}, parsing TOML`);
+        if (fs.existsSync(configPath)) {
+          core.debug(`Found ${configName}, parsing TOML`);
 
-				Object.assign(toolchain, parseConfig(configPath));
-				break;
-			}
-		}
+          Object.assign(toolchain, parseConfig(configPath));
+          break;
+        }
+      }
+    }
 	}
 
 	core.info('Inheriting toolchain settings from inputs');