diff --git a/tools/dev_constraints.txt b/tools/dev_constraints.txt
index 90b4775c1..1aa8414f9 100644
--- a/tools/dev_constraints.txt
+++ b/tools/dev_constraints.txt
@@ -42,12 +42,12 @@ mypy==0.600
 ndg-httpsclient==0.3.2
 oauth2client==2.0.0
 pathlib2==2.3.0
-pexpect==4.2.1
+pexpect==4.7.0
 pickleshare==0.7.4
 pkginfo==1.4.2
 pluggy==0.5.2
 prompt-toolkit==1.0.15
-ptyprocess==0.5.2
+ptyprocess==0.6.0
 py==1.8.0
 pyasn1==0.1.9
 pyasn1-modules==0.0.10