diff --git a/platformio/managers/core.py b/platformio/managers/core.py
index 995634db..5b5529b0 100644
--- a/platformio/managers/core.py
+++ b/platformio/managers/core.py
@@ -22,7 +22,7 @@ from platformio.managers.package import PackageManager
 
 CORE_PACKAGES = {
     "contrib-piohome": ">=0.6.0,<2",
-    "contrib-pysite": ">=0.1.1,<2",
+    "contrib-pysite": ">=0.1.2,<2",
     "tool-pioplus": ">=0.12.1,<2",
     "tool-unity": "~1.20302.1",
     "tool-scons": "~3.20501.2"
diff --git a/setup.py b/setup.py
index dceee7b2..df14dd1d 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@ from platformio import (__author__, __description__, __email__, __license__,
                         __title__, __url__, __version__)
 
 install_requires = [
-    "arrow==0.10.0",
+    "arrow>=0.10.0,!=0.11.0",
     "bottle<0.13",
     "click>=5,<6",
     "colorama",