diff --git a/lib/devicectl.ts b/lib/devicectl.ts
index dd41593..7617f68 100644
--- a/lib/devicectl.ts
+++ b/lib/devicectl.ts
@@ -103,7 +103,9 @@ export class Devicectl {
 
       return result as ExecuteResult<T>;
     } catch (e: any) {
-      throw new Error(`'${cmdStr}' failed. Original error: ${e.stderr || e.stdout || e.message}`);
+      throw new Error(`'${cmdStr}' failed. Original error: ${e.stderr || e.stdout || e.message}`, {
+        cause: e,
+      });
     }
   }
 
diff --git a/lib/types.ts b/lib/types.ts
index 9fd7178..b5c52ba 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -1,4 +1,4 @@
-import {SubProcess, TeenProcessExecResult} from 'teen_process';
+import type {SubProcess, TeenProcessExecResult} from 'teen_process';
 
 /**
  * Information about a running process on the device
diff --git a/tsconfig.json b/tsconfig.json
index bea76f8..7f46171 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,8 @@
     "outDir": "build",
     "checkJs": true,
     "esModuleInterop": true,
-    "types": ["node", "mocha"]
+    "types": ["node", "mocha"],
+    "strict": true
   },
   "ts-node": {
     "transpileOnly": true,