diff --git a/requirements/build.txt b/requirements/build.txt
index dbe61bf5..eb1ce8b4 100644
--- a/requirements/build.txt
+++ b/requirements/build.txt
@@ -87,26 +87,28 @@ django-constance==2.3.1 \
     --hash=sha256:a49735063b2c30015d2e52a90609ea9798da722ed070f091de51714758a5d018
 django-npm==1.0.0 \
     --hash=sha256:2e6bba65e728fa18b9db3c8dc0d4490b70cb7f43bacf60eb3654d7dcb6424272
-cryptography==2.4.2 \
-    --hash=sha256:0ff4a3d6ea86aa0c9e06e92a9f986de7ee8231f36c4da1b31c61a7e692ef3378 \
-    --hash=sha256:63b064a074f8dc61be81449796e2c3f4e308b6eba04a241a5c9f2d05e882c681 \
-    --hash=sha256:b4fc04326b2d259ddd59ed8ea20405d2e695486ab4c5e1e49b025c484845206e \
-    --hash=sha256:0eb83a24c650a36f68e31a6d0a70f7ad9c358fa2506dc7b683398b92e354a038 \
-    --hash=sha256:af12dfc9874ac27ebe57fc28c8df0e8afa11f2a1025566476b0d50cdb8884f70 \
-    --hash=sha256:5ecaf9e7db3ca582c6de6229525d35db8a4e59dc3e8a40a331674ed90e658cbf \
-    --hash=sha256:3cdc5f7ca057b2214ce4569e01b0f368b3de9d8ee01887557755ccd1c15d9427 \
-    --hash=sha256:21e63dd20f5e5455e8b34179ac43d95b3fb1ffa54d071fd2ed5d67da82cfe6dc \
-    --hash=sha256:8908f1db90be48b060888e9c96a0dee9d842765ce9594ff6a23da61086116bb6 \
-    --hash=sha256:70596e90398574b77929cd87e1ac6e43edd0e29ba01e1365fed9c26bde295aa5 \
-    --hash=sha256:471a097076a7c4ab85561d7fa9a1239bd2ae1f9fd0047520f13d8b340bf3210b \
-    --hash=sha256:70c2b04e905d3f72e2ba12c58a590817128dfca08949173faa19a42c824efa0b \
-    --hash=sha256:6afe324dfe6074822ccd56d80420df750e19ac30a4e56c925746c735cf22ae8b \
-    --hash=sha256:da5b5dda4aa0d5e2b758cc8dfc67f8d4212e88ea9caad5f61ba132f948bab859 \
-    --hash=sha256:1699f3e916981df32afdd014fb3164db28cdb61c757029f502cb0a8c29b2fdb3 \
-    --hash=sha256:2454ada8209bbde97065453a6ca488884bbb263e623d35ba183821317a58b46f \
-    --hash=sha256:1b1f136d74f411f587b07c076149c4436a169dc19532e587460d9ced24adcc13 \
-    --hash=sha256:418e7a5ec02a7056d3a4f0c0e7ea81df374205f25f4720bb0e84189aa5fd2515 \
-    --hash=sha256:05a6052c6a9f17ff78ba78f8e6eb1d777d25db3b763343a1ae89a7a8670386dd
+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
 cffi==1.11.5 \
     --hash=sha256:1b0493c091a1898f1136e3f4f991a784437fac3673780ff9de3bcf46c80b6b50 \
     --hash=sha256:87f37fe5130574ff76c17cab61e7d2538a16f843bb7bca8ebbc4b12de3078596 \