diff --git a/requirements-constraints.txt b/requirements-constraints.txt
index 93b7fe3..6530183 100644
--- a/requirements-constraints.txt
+++ b/requirements-constraints.txt
@@ -56,28 +56,26 @@ MarkupSafe==1.1.1 \
 pyOpenSSL==19.1.0 \
     --hash=sha256:621880965a720b8ece2f1b2f54ea2071966ab00e2970ad2ce11d596102063504 \
     --hash=sha256:9a24494b2602aaf402be5c9e30a0b82d4a5c67528fe8fb475e3f3bc00dd69507
-cryptography==2.8 \
-    --hash=sha256:fb81c17e0ebe3358486cd8cc3ad78adbae58af12fc2bf2bc0bb84e8090fa5ce8 \
-    --hash=sha256:44ff04138935882fef7c686878e1c8fd80a723161ad6a98da31e14b7553170c2 \
-    --hash=sha256:369d2346db5934345787451504853ad9d342d7f721ae82d098083e1f49a582ad \
-    --hash=sha256:58363dbd966afb4f89b3b11dfb8ff200058fbc3b947507675c19ceb46104b48d \
-    --hash=sha256:6ec280fb24d27e3d97aa731e16207d58bd8ae94ef6eab97249a2afe4ba643d42 \
-    --hash=sha256:df6b4dca2e11865e6cfbfb708e800efb18370f5a46fd601d3755bc7f85b3a8a2 \
-    --hash=sha256:7f09806ed4fbea8f51585231ba742b58cbcfbfe823ea197d8c89a5e433c7e912 \
-    --hash=sha256:b43f53f29816ba1db8525f006fa6f49292e9b029554b3eb56a189a70f2a40879 \
-    --hash=sha256:7270a6c29199adc1297776937a05b59720e8a782531f1f122f2eb8467f9aab4d \
-    --hash=sha256:de96157ec73458a7f14e3d26f17f8128c959084931e8997b9e655a39c8fde9f9 \
-    --hash=sha256:02079a6addc7b5140ba0825f542c0869ff4df9a69c360e339ecead5baefa843c \
-    --hash=sha256:b0de590a8b0979649ebeef8bb9f54394d3a41f66c5584fff4220901739b6b2f0 \
-    --hash=sha256:ecadccc7ba52193963c0475ac9f6fa28ac01e01349a2ca48509667ef41ffd2cf \
-    --hash=sha256:90df0cc93e1f8d2fba8365fb59a858f51a11a394d64dbf3ef844f783844cc793 \
-    --hash=sha256:1df22371fbf2004c6f64e927668734070a8953362cd8370ddd336774d6743595 \
-    --hash=sha256:a518c153a2b5ed6b8cc03f7ae79d5ffad7315ad4569b2d5333a13c38d64bd8d7 \
-    --hash=sha256:4b1030728872c59687badcca1e225a9103440e467c17d6d1730ab3d2d64bfeff \
-    --hash=sha256:d31402aad60ed889c7e57934a03477b572a03af7794fa8fb1780f21ea8f6551f \
-    --hash=sha256:73fd30c57fa2d0a1d7a49c561c40c2f79c7d6c374cc7750e9ac7c99176f6428e \
-    --hash=sha256:971221ed40f058f5662a604bd1ae6e4521d84e6cad0b7b170564cc34169c8f13 \
-    --hash=sha256:3cda1f0ed8747339bbdf71b9f38ca74c7b592f24f65cdb3ab3765e4b02871651
+cryptography==2.9 \
+    --hash=sha256:ef9a55013676907df6c9d7dd943eb1770d014f68beaa7e73250fb43c759f4585 \
+    --hash=sha256:2a2ad24d43398d89f92209289f15265107928f22a8d10385f70def7a698d6a02 \
+    --hash=sha256:95e1296e0157361fe2f5f0ed307fd31f94b0ca13372e3673fa95095a627636a1 \
+    --hash=sha256:19ae795137682a9778892fb4390c07811828b173741bce91e30f899424b3934d \
+    --hash=sha256:d1bf5a1a0d60c7f9a78e448adcb99aa101f3f9588b16708044638881be15d6bc \
+    --hash=sha256:192ca04a36852a994ef21df13cca4d822adbbdc9d5009c0f96f1d2929e375d4f \
+    --hash=sha256:ed1d0760c7e46436ec90834d6f10477ff09475c692ed1695329d324b2c5cd547 \
+    --hash=sha256:1b9b535d6b55936a79dbe4990b64bb16048f48747c76c29713fea8c50eca2acf \
+    --hash=sha256:7a279f33a081d436e90e91d1a7c338553c04e464de1c9302311a5e7e4b746088 \
+    --hash=sha256:49870684da168b90110bbaf86140d4681032c5e6a2461adc7afdd93be5634216 \
+    --hash=sha256:6b91cab3841b4c7cb70e4db1697c69f036c8bc0a253edc0baa6783154f1301e4 \
+    --hash=sha256:587f98ce27ac4547177a0c6fe0986b8736058daffe9160dcf5f1bd411b7fbaa1 \
+    --hash=sha256:cc20316e3f5a6b582fc3b029d8dc03aabeb645acfcb7fc1d9848841a33265748 \
+    --hash=sha256:3be7a5722d5bfe69894d3f7bbed15547b17619f3a88a318aab2e37f457524164 \
+    --hash=sha256:7598974f6879a338c785c513e7c5a4329fbc58b9f6b9a6305035fca5b1076552 \
+    --hash=sha256:5aca6f00b2f42546b9bdf11a69f248d1881212ce5b9e2618b04935b87f6f82a1 \
+    --hash=sha256:9fc9da390e98cb6975eadf251b6e5fa088820141061bf041cd5c72deba1dc526 \
+    --hash=sha256:6b744039b55988519cc183149cceb573189b3e46e16ccf6f8c46798bb767c9dc \
+    --hash=sha256:0cacd3ef5c604b8e5f59bf2582c076c98a37fe206b31430d0cd08138aff0986e
 six==1.14.0 \
     --hash=sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c \
     --hash=sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a