diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 000000000..5118fe7b3
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,13 @@
+coverage:
+  status:
+    project:
+      linux:
+        flags: linux
+        target: 98.48
+        threshold: 0.1
+        base: auto
+      windows:
+        flags: windows
+        target: 96.84
+        threshold: 0.1
+        base: auto
diff --git a/.travis.yml b/.travis.yml
index cabd3cf73..b23164a19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -224,7 +224,7 @@ script:
     - tox
     - '[ -z "${BOULDER_INTEGRATION+x}" ] || (tests/boulder-fetch.sh && tests/tox-boulder-integration.sh)'
 
-after_success: '[ "$TOXENV" == "py27-cover" ] && codecov'
+after_success: '[ "$TOXENV" == "py27-cover" ] && codecov -F linux'
 
 notifications:
   email: false
diff --git a/appveyor.yml b/appveyor.yml
index 12d882973..ed3e87c6c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -37,4 +37,4 @@ test_script:
   - tox
 
 on_success:
-  - if exist .coverage codecov
+  - if exist .coverage codecov -F windows