diff --git a/MANIFEST.in b/MANIFEST.in
index 514440d..b564267 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,3 +3,4 @@ include gramtools/version/Makefile
 include CMakeLists.txt
 graft libgramtools
 prune libgramtools/tests
+global-exclude *~ *.swp
diff --git a/README.md b/README.md
index dfcaa26..a9aceb2 100644
--- a/README.md
+++ b/README.md
@@ -137,7 +137,7 @@ The documentation gets generated in doc/html/index.html and provides a useful re
 
 ## Contributing
 
-Please refer to the [developers wiki page](https://github.com/iqbal-lab-org/gramtools/wiki).
+Please refer to the [developers wiki page](https://github.com/iqbal-lab-org/gramtools/wiki/Developers%3A-tips).
 
 ## License
 
diff --git a/setup.py b/setup.py
index 75e0735..59676f1 100644
--- a/setup.py
+++ b/setup.py
@@ -162,7 +162,7 @@ def run(self):
         "biopython == 1.76",
         "Cython == 0.29.16",
         "pysam == 0.15.4",
-        "py-cortex-api == 2.0",
+        "py-cortex-api == 2.1.0",
         "cluster_vcf_records >= 0.9.2",
     ],
     test_suite="gramtools.tests",