diff --git a/requirements-dev.txt b/requirements-dev.txt
index c418d69feb..23ae5af3d1 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -162,10 +162,8 @@ pycodestyle==2.3.1
     # via flake8
 pyflakes==1.5.0
     # via flake8
-pyinstrument==3.4.2
+pyinstrument==4.6.2
     # via -r requirements-dev.in
-pyinstrument-cext==0.2.4
-    # via pyinstrument
 pympler==1.0.1
     # via -r requirements-dev.in
 pypandoc==1.8.1