diff --git a/src/ValidatorVisitor.php b/src/ValidatorVisitor.php
index 695cdc5..33650c5 100644
--- a/src/ValidatorVisitor.php
+++ b/src/ValidatorVisitor.php
@@ -287,6 +287,10 @@ public function leaveNode(Node $node){
                 if($this->sandbox->isDefinedClass($class)){
                     $node->type = new Node\Name($this->sandbox->getDefinedClass($class));
                 }
+                if ($this->sandbox->isWhitelistedInterface($class))
+                    $this->sandbox->checkInterface($class);
+                else
+                    $this->sandbox->checkType($class);
                 return $node;
             } else if($node instanceof Node\Expr\New_){
                 if(!$this->sandbox->allow_objects){
@@ -358,6 +362,10 @@ public function leaveNode(Node $node){
                     } else {
                         $this->sandbox->validationError("Sandboxed code attempted use invalid namespace or alias!", Error::DEFINE_ALIAS_ERROR, $node);
                     }
+                    if ($this->sandbox->isWhitelistedInterface($use->alias))
+                        $this->sandbox->checkInterface($use->alias);
+                    else
+                        $this->sandbox->checkType($use->alias);
                 }
                 return false;
             } else if($node instanceof Node\Expr\ShellExec){
diff --git a/tests/DefaultConfigTest.php b/tests/DefaultConfigTest.php
index af4f488..fd3c558 100644
--- a/tests/DefaultConfigTest.php
+++ b/tests/DefaultConfigTest.php
@@ -431,4 +431,24 @@ public function testWhitelistMagicConstants(){
             $this->sandbox->whitelistMagicConst('DIR');
             $this->assertEquals(str_replace('tests', 'src', __DIR__), $this->sandbox->execute(function(){ return __DIR__; }));
         }
+
+        /**
+         * Test whether sandbox disallows non-whitelisted classes in use statements
+         */
+        public function testDisallowsTypeInUse(){
+            $this->expectException('PHPSandbox\Error');
+            $this->sandbox->allow_aliases = true;
+            $this->sandbox->execute('use TestClass;');
+        }
+
+        /**
+         * Test whether sandbox disallows non-whitelisted classes in parameter type hints
+         */
+        public function testDisallowsTypeInParam(){
+            $this->expectException('PHPSandbox\Error');
+            $this->sandbox->allow_functions = true;
+            $this->sandbox->execute(function() {
+                function testTypeInParam(TestClass $param) {};
+            });
+        }
     }
\ No newline at end of file