diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5b672466b..40016e5f9 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -53,12 +53,20 @@ atomicwrites==1.3.0 \
 more-itertools==7.2.0 \
     --hash=sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4 \
     --hash=sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832
+packaging==19.1 \
+    --hash=sha256:630ac83e8f8a9566c4f88038447ed9e16e6f10582767a01f31c769d9a71e \
+    --hash=sha256:a7ac867b97fdc07ee80a8058fe4435ccd274ecc3b0ed61d852d7d53055528cf9
 pluggy==0.12.0 \
     --hash=sha256:b9817417e95936bf75d85d3f8767f7df6cdde751fc40aed3bb3074cbcb77757c \
     --hash=sha256:0825a152ac059776623854c1543d65a4ad408eb3d33ee114dff91e57ec6ae6fc
 py==1.8.0 \
     --hash=sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa \
     --hash=sha256:dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53
+pyparsing==2.4.2 \
+    --hash=sha256:d9338df12903bbf5d65a0e4e87c2161968b10d2e489652bb47001d82a9b028b4
+wcwidth==0.1.7 \
+    --hash=sha256:526a6947247599b084ee5232e4f9190a38f398d7300d866af3ab571a5bfe \
+    --hash=sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c
 
 # Required by mock
 funcsigs==1.0.2 --hash=sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca