diff --git a/.travis.yml b/.travis.yml
index f1cfff76..27ab68b8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: python
 python:
   # We don't actually use the Travis Python, but this keeps it organized.
+  - "2.7"
   - "3.6"
   - "3.7"
   - "3.8"
diff --git a/CHANGES.md b/CHANGES.md
index 78ead5a9..f99327c1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,11 @@
 # Release notes #
 
-## Upcoming release...
+## [v0.8.10](https://github.com/mirnylab/cooler/compare/v0.8.9...v0.8.10)
+
+Date : 2020-09-25
+
+### Bug fixes
+* Fixed the new header parsing in `cooler cload pairs` to handle esoteric file stream implementations. Specifically `GzipFile` had stopped working. By @golobor
 
 ## [v0.8.9](https://github.com/mirnylab/cooler/compare/v0.8.8...v0.8.9)
 
diff --git a/cooler/_version.py b/cooler/_version.py
index d718d4c3..c306e3db 100644
--- a/cooler/_version.py
+++ b/cooler/_version.py
@@ -1,4 +1,4 @@
-__version__ = "0.8.9"
+__version__ = "0.8.10"
 __format_version__ = 3
 __format_version_mcool__ = 2
 __format_version_scool__ = 1
diff --git a/requirements-dev.txt b/requirements-dev.txt
index a53c0044..9dfc3c16 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,11 @@
 -r requirements.txt
+biopython<1.77
 dask[array,dataframe]
-pytest
+ipytree
+matplotlib
 mock
+psutil
+pysam
+pytest
 pytest-flake8
-pytest-cov
\ No newline at end of file
+pytest-cov
diff --git a/requirements.txt b/requirements.txt
index ddb21e89..e43364fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ scipy>=0.16
 pandas
 h5py>=2.5
 click>=7
-cytoolz
+cytoolz<0.11
 multiprocess
 pyfaidx
 pypairix