diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 0.2.1.0
+
+* Use TLS manager (to download from Github)
+
 ## 0.2.0.0
 
 * Minor fixes
diff --git a/Stackage/CompleteBuild.hs b/Stackage/CompleteBuild.hs
--- a/Stackage/CompleteBuild.hs
+++ b/Stackage/CompleteBuild.hs
@@ -12,6 +12,7 @@
 import Data.Time
 import Data.Yaml                 (decodeFileEither, encodeFile)
 import Network.HTTP.Client
+import Network.HTTP.Client.TLS   (tlsManagerSettings)
 import Stackage.BuildConstraints
 import Stackage.BuildPlan
 import Stackage.CheckBuildPlan
@@ -129,7 +130,7 @@
     ]
 
 completeBuild :: BuildType -> IO ()
-completeBuild buildType = withManager defaultManagerSettings $ \man -> do
+completeBuild buildType = withManager tlsManagerSettings $ \man -> do
     hSetBuffering stdout LineBuffering
 
     putStrLn $ "Loading settings for: " ++ tshow buildType
diff --git a/stackage.cabal b/stackage.cabal
--- a/stackage.cabal
+++ b/stackage.cabal
@@ -1,5 +1,5 @@
 name:                stackage
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis:            "Stable Hackage," tools for creating a vetted set of packages from Hackage.
 description:         Please see <http://www.stackage.org/package/stackage> for a description and documentation.
 homepage:            https://github.com/fpco/stackage
@@ -53,6 +53,7 @@
                      , yaml
                      , unix-compat
                      , http-client
+                     , http-client-tls
                      , temporary
                      , data-default-class
                      , stm