diff --git a/setup.cfg b/setup.cfg
index 619cb6e90180da5d3ad39a1d11419d57e0b6a7b8..d0594a39af5ed28376848e39650195c2f411a55d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = quingo
-version = 0.1.5
+version = 0.1.6
 author = Xiang Fu
 author_email = gtaifu@gmail.com
 use_2to3 = False
diff --git a/src/quingo/core/manager.py b/src/quingo/core/manager.py
index 36198921c6ac6cad5d0c9c5bd94faea9a53dc998..bdf646880ae27313dea983b7c03f16934abb2eee 100755
--- a/src/quingo/core/manager.py
+++ b/src/quingo/core/manager.py
@@ -555,7 +555,7 @@ class Runtime_system_manager:
 
         # The project root directory is added to the compiler module search path.
         compile_cmd = (
-            '{header}{qgc_path} {main_fn}{sep} -I {root_dir} -o "{qasm_fn}"'.format(
+            '{header}"{qgc_path}" "{main_fn}"{sep} -I "{root_dir}" -o "{qasm_fn}"'.format(
                 header=header,
                 qgc_path=quingoc_path,
                 main_fn=str(self.main_file_fn),
diff --git a/src/quingo/install_quingoc.py b/src/quingo/install_quingoc.py
index 862eb4ecdc86bc8dd678d8f6ac6af4aded02d815..b645e2ae76506811a0366b93de3ec7eba1764a00 100644
--- a/src/quingo/install_quingoc.py
+++ b/src/quingo/install_quingoc.py
@@ -240,8 +240,7 @@ def download_compiler(os_name, tmp_dir_name):
         raise RuntimeError(
             "Failed to get quingo compiler release package for {} platform.".format(os_name))
 
-    quingoc_url = quingoc_asset['browser_download_url'] + \
-        '/' + quingoc_asset['name']
+    quingoc_url = quingoc_asset['browser_download_url'] + '/'
 
     try:
         quingoc_response = requests.get(quingoc_url, stream=True)