diff --git a/Pipfile.lock b/Pipfile.lock
index 991a0e4..054ff4e 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -3,6 +3,7 @@
         "hash": {
             "sha256": "f0026da2573dccbb42b772bbdb3ee79f0b3c166cfacd8f8f28542a224a654bde"
         },
+        "pipfile-spec": 6,
         "requires": {},
         "sources": [
             {
@@ -13,7 +14,37 @@
     },
     "default": {
         "lxml": {
-            "version": "==3.8.0"
+            "hashes": [
+                "sha256:01c45df6d90497c20aa2a07789a41941f9a1029faa30bf725fc7f6d515b1afe9",
+                "sha256:0c9fef4f8d444e337df96c54544aeb85b7215b2ed7483bb6c35de97ac99f1bcd",
+                "sha256:0e3cd94c95d30ba9ca3cff40e9b2a14e1a10a4fd8131105b86c6b61648f57e4b",
+                "sha256:0e7996e9b46b4d8b4ac1c329a00e2d10edcd8380b95d2a676fccabf4c1dd0512",
+                "sha256:1858b1933d483ec5727549d3fe166eeb54229fbd6a9d3d7ea26d2c8a28048058",
+                "sha256:1b164bba1320b14905dcff77da10d5ce9c411ac4acc4fb4ed9a2a4d10fae38c9",
+                "sha256:1b46f37927fa6cd1f3fe34b54f1a23bd5bea1d905657289e08e1297069a1a597",
+                "sha256:231047b05907315ae9a9b6925751f9fd2c479cf7b100fff62485a25e382ca0d4",
+                "sha256:28f0c6652c1b130f1e576b60532f84b19379485eb8da6185c29bd8c9c9bc97bf",
+                "sha256:34d49d0f72dd82b9530322c48b70ac78cca0911275da741c3b1d2f3603c5f295",
+                "sha256:3682a17fbf72d56d7e46db2e80ca23850b79c28cfe75dcd9b82f58808f730909",
+                "sha256:3cf2830b9a6ad7f6e965fa53a768d4d2372a7856f20ffa6ce43d2fe9c0d34b19",
+                "sha256:5b653c9379ce29ce271fbe1010c5396670f018e78b643e21beefbb3dc6d291de",
+                "sha256:65a272821d5d8194358d6b46f3ca727fa56a6b63981606eac737c86d27309cdd",
+                "sha256:691f2cd97cf026c611df1ea5055755eec7f878f2d4f4330dc8686583de6fc5fd",
+                "sha256:6b6379495d3baacf7ed755ac68547c8dff6ce5d37bf370f0b7678888dc1283f9",
+                "sha256:75322a531504d4f383264391d89993a42e286da8821ddc5ac315e57305cb84f0",
+                "sha256:7f457cbda964257f443bac861d3a36732dcba8183149e7818ee2fb7c86901b94",
+                "sha256:7ff1fc76d8804e0f870c343a72007ff587090c218b0f92d8ee784ac2b6eaf5b9",
+                "sha256:8523fbde9c2216f3f2b950cb01ebe52e785eaa8a07ffeb456dd3576ca1b4fb9b",
+                "sha256:8f37627f16e026523fca326f1b5c9a43534862fede6c3e99c2ba6a776d75c1ab",
+                "sha256:a7182ea298cc3555ea56ffbb0748fe0d5e0d81451e2bc16d7f4645cd01b1ca70",
+                "sha256:abbd2fb4a5a04c11b5e04eb146659a0cf67bb237dd3d7ca3b9994d3a9f826e55",
+                "sha256:accc9f6b77bed0a6f267b4fae120f6008a951193d548cdbe9b61fc98a08b1cf8",
+                "sha256:bd88c8ce0d1504fdfd96a35911dd4f3edfb2e560d7cfdb5a3d09aa571ae5fbae",
+                "sha256:c557ad647facb3c0027a9d0af58853f905e85a0a2f04dcb73f8e665272fcdc3a",
+                "sha256:defabb7fbb99f9f7b3e0b24b286a46855caef4776495211b066e9e6592d12b04",
+                "sha256:e2629cdbcad82b83922a3488937632a4983ecc0fed3e5cfbf430d069382eeb9b"
+            ],
+            "version": "==4.2.1"
         },
         "psycopg2": {
             "version": "==2.7.1"