diff --git a/requirements.txt b/requirements.txt
index d4ebbcb..57aad59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -226,7 +226,7 @@ numpy==1.18.1
     #   statsmodels
 oauthlib==3.1.0
     # via requests-oauthlib
-opensafely-cohort-extractor==1.87.0
+opensafely-cohort-extractor==1.88.0
     # via -r requirements.in
 opensafely-matching==0.2.0
     # via -r requirements.in