diff --git a/requirements/CI-tests-conda/requirements.txt b/requirements/CI-tests-conda/requirements.txt
index 17c9a8d8d..64c5c3293 100644
--- a/requirements/CI-tests-conda/requirements.txt
+++ b/requirements/CI-tests-conda/requirements.txt
@@ -5,4 +5,4 @@ jsonschema<4.0
 gsl
 tskit==0.4.0
 stdpopsim==0.1.2
-demes==0.2.0
+demes==0.2.1
diff --git a/requirements/CI-tests-pip/requirements.txt b/requirements/CI-tests-pip/requirements.txt
index 50609af1f..6f8009a28 100644
--- a/requirements/CI-tests-pip/requirements.txt
+++ b/requirements/CI-tests-pip/requirements.txt
@@ -1,6 +1,5 @@
 bintrees==2.2.0
 daiquiri==3.0.1
-demes==0.2.0
 newick==1.3.1
 numpy==1.21.4
 pytest==6.2.5