diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index a4b62abe..474ead29 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,7 @@
 Changelog
 =========
 
+- Relax tightly pinned dependency on a version of dask[distributed]
 - Change lotka-volterra priors to follow the given reference
 - Fix README.md badges
 - Fix a few small issues with CONTRIBUTING.rst
diff --git a/requirements-dev.txt b/requirements-dev.txt
index f0d315b4..d9983345 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,7 +8,7 @@ pytest-rerunfailures>=4.1
 # Linting
 flake8>=3.0.4
 flake8-docstrings>=1.0.2
-isort>=4.2.5
+isort>=4.2.5, <5.0.0
 flake8-isort>=2.0.1
 pydocstyle<5.0.0
 
diff --git a/requirements.txt b/requirements.txt
index b785af1e..129b32bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-dask[distributed]==2.30.0
+dask[distributed]>=2.30.0
 numpy>=1.12.1
 scipy>=0.19
 matplotlib>=1.1