diff --git a/package.json b/package.json
index ee92274..b8599f0 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "bigi": "^1.4.2",
     "bitcoinjs-lib": "^5.0.5",
-    "fast-csv": "^2.5.0",
+    "fast-csv": "^4.3.6",
     "level": "^5.0.1",
     "log4js": "^4.3.1",
     "mongodb": "^3.2.6",
diff --git a/yarn.lock b/yarn.lock
index 93e6d50..227ad46 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,11 +2,41 @@
 # yarn lockfile v1
 
 
+"@fast-csv/format@4.3.5":
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/@fast-csv/format/-/format-4.3.5.tgz#90d83d1b47b6aaf67be70d6118f84f3e12ee1ff3"
+  integrity sha512-8iRn6QF3I8Ak78lNAa+Gdl5MJJBM5vRHivFtMRUWINdevNo00K7OXxS2PshawLKTejVwieIlPmK5YlLu6w4u8A==
+  dependencies:
+    "@types/node" "^14.0.1"
+    lodash.escaperegexp "^4.1.2"
+    lodash.isboolean "^3.0.3"
+    lodash.isequal "^4.5.0"
+    lodash.isfunction "^3.0.9"
+    lodash.isnil "^4.0.0"
+
+"@fast-csv/parse@4.3.6":
+  version "4.3.6"
+  resolved "https://registry.yarnpkg.com/@fast-csv/parse/-/parse-4.3.6.tgz#ee47d0640ca0291034c7aa94039a744cfb019264"
+  integrity sha512-uRsLYksqpbDmWaSmzvJcuApSEe38+6NQZBUsuAyMZKqHxH0g1wcJgsKUvN3WC8tewaqFjBMMGrkHmC+T7k8LvA==
+  dependencies:
+    "@types/node" "^14.0.1"
+    lodash.escaperegexp "^4.1.2"
+    lodash.groupby "^4.6.0"
+    lodash.isfunction "^3.0.9"
+    lodash.isnil "^4.0.0"
+    lodash.isundefined "^3.0.1"
+    lodash.uniq "^4.5.0"
+
 "@types/node@10.12.18":
   version "10.12.18"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.18.tgz#1d3ca764718915584fcd9f6344621b7672665c67"
   integrity sha512-fh+pAqt4xRzPfqA6eh3Z2y6fyZavRIumvjhaCL753+TVkGKGhpPeyrJG2JftD0T9q4GF00KjefsQ+PQNDdWQaQ==
 
+"@types/node@^14.0.1":
+  version "14.14.11"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.11.tgz#fc25a4248a5e8d0837019b1d170146d07334abe0"
+  integrity sha512-BJ97wAUuU3NUiUCp44xzUFquQEvnk1wu7q4CMEUYKJWjdkr0YWYDsm4RFtAvxYsNjLsKcrFt6RvK8r+mnzMbEQ==
+
 abbrev@1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
@@ -66,14 +96,6 @@ are-we-there-yet@~1.1.2:
     delegates "^1.0.0"
     readable-stream "^2.0.6"
 
-arguments-extended@~0.0.3:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/arguments-extended/-/arguments-extended-0.0.3.tgz#6107e4917d0eb6f0a4dd66320fc15afc72ef4946"
-  integrity sha1-YQfkkX0OtvCk3WYyD8Fa/HLvSUY=
-  dependencies:
-    extended "~0.0.3"
-    is-extended "~0.0.8"
-
 arr-diff@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-2.0.0.tgz#8f3b827f955a8bd669697e4a4256ac3ceae356cf"
@@ -96,15 +118,6 @@ arr-union@^3.1.0:
   resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
   integrity sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=
 
-array-extended@~0.0.3, array-extended@~0.0.4, array-extended@~0.0.5:
-  version "0.0.11"
-  resolved "https://registry.yarnpkg.com/array-extended/-/array-extended-0.0.11.tgz#d7144ae748de93ca726f121009dbff1626d164bd"
-  integrity sha1-1xRK50jek8pybxIQCdv/FibRZL0=
-  dependencies:
-    arguments-extended "~0.0.3"
-    extended "~0.0.3"
-    is-extended "~0.0.3"
-
 array-unique@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.2.1.tgz#a1d97ccafcbc2625cc70fadceb36a50c58b01a53"
@@ -666,15 +679,6 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-date-extended@~0.0.3:
-  version "0.0.6"
-  resolved "https://registry.yarnpkg.com/date-extended/-/date-extended-0.0.6.tgz#23802d57dd1bf7818813fe0c32e851a86da267c9"
-  integrity sha1-I4AtV90b94GIE/4MMuhRqG2iZ8k=
-  dependencies:
-    array-extended "~0.0.3"
-    extended "~0.0.3"
-    is-extended "~0.0.3"
-
 date-format@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/date-format/-/date-format-2.0.0.tgz#7cf7b172f1ec564f0003b39ea302c5498fb98c8f"
@@ -701,11 +705,6 @@ debug@^4.1.1:
   dependencies:
     ms "^2.1.1"
 
-declare.js@~0.0.4:
-  version "0.0.8"
-  resolved "https://registry.yarnpkg.com/declare.js/-/declare.js-0.0.8.tgz#0478adff9564c004f51df73d8bc134019d28dcde"
-  integrity sha1-BHit/5VkwAT1Hfc9i8E0AZ0o3N4=
-
 decode-uri-component@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
@@ -863,20 +862,6 @@ extend@~3.0.2:
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
   integrity sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==
 
-extended@0.0.6, extended@~0.0.3:
-  version "0.0.6"
-  resolved "https://registry.yarnpkg.com/extended/-/extended-0.0.6.tgz#7fb8bf7b9dae397586e48570acfd642c78e50669"
-  integrity sha1-f7i/e52uOXWG5IVwrP1kLHjlBmk=
-  dependencies:
-    extender "~0.0.5"
-
-extender@~0.0.5:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/extender/-/extender-0.0.10.tgz#589c07482be61a1460b6d81f9c24aa67e8f324cd"
-  integrity sha1-WJwHSCvmGhRgttgfnCSqZ+jzJM0=
-  dependencies:
-    declare.js "~0.0.4"
-
 extglob@^0.3.1:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/extglob/-/extglob-0.3.2.tgz#2e18ff3d2f49ab2765cec9023f011daa8d8349a1"
@@ -908,16 +893,13 @@ extsprintf@^1.2.0:
   resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz#e2689f8f356fad62cca65a3a91c5df5f9551692f"
   integrity sha1-4mifjzVvrWLMplo6kcXfX5VRaS8=
 
-fast-csv@^2.5.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/fast-csv/-/fast-csv-2.5.0.tgz#5332dfede3f59340cb8e9f46b2e6dff1e7612005"
-  integrity sha512-M/9ezLU9/uDwvDZTt9sNFJa0iLDUsbhYJwPtnE0D9MjeuB6DY9wRCyUPZta9iI6cSz5wBWGaUPL61QH8h92cNA==
+fast-csv@^4.3.6:
+  version "4.3.6"
+  resolved "https://registry.yarnpkg.com/fast-csv/-/fast-csv-4.3.6.tgz#70349bdd8fe4d66b1130d8c91820b64a21bc4a63"
+  integrity sha512-2RNSpuwwsJGP0frGsOmTb9oUF+VkFSM4SyLTDgwf2ciHWTarN0lQTC+F2f/t5J9QjW+c65VFIAAu85GsvMIusw==
   dependencies:
-    extended "0.0.6"
-    is-extended "0.0.10"
-    object-extended "0.0.7"
-    safer-buffer "^2.1.2"
-    string-extended "0.0.8"
+    "@fast-csv/format" "4.3.5"
+    "@fast-csv/parse" "4.3.6"
 
 fast-deep-equal@^2.0.1:
   version "2.0.1"
@@ -1329,13 +1311,6 @@ is-extendable@^1.0.1:
   dependencies:
     is-plain-object "^2.0.4"
 
-is-extended@0.0.10, is-extended@~0.0.3, is-extended@~0.0.8:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/is-extended/-/is-extended-0.0.10.tgz#244e140df75bb1c9a3106f412ff182fb534a6d62"
-  integrity sha1-JE4UDfdbscmjEG9BL/GC+1NKbWI=
-  dependencies:
-    extended "~0.0.3"
-
 is-extglob@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-1.0.0.tgz#ac468177c4943405a092fc8f29760c6ffc6206c0"
@@ -1591,6 +1566,46 @@ levelup@^4.0.0:
     level-iterator-stream "~4.0.0"
     xtend "~4.0.0"
 
+lodash.escaperegexp@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/lodash.escaperegexp/-/lodash.escaperegexp-4.1.2.tgz#64762c48618082518ac3df4ccf5d5886dae20347"
+  integrity sha1-ZHYsSGGAglGKw99Mz11YhtriA0c=
+
+lodash.groupby@^4.6.0:
+  version "4.6.0"
+  resolved "https://registry.yarnpkg.com/lodash.groupby/-/lodash.groupby-4.6.0.tgz#0b08a1dcf68397c397855c3239783832df7403d1"
+  integrity sha1-Cwih3PaDl8OXhVwyOXg4Mt90A9E=
+
+lodash.isboolean@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.isboolean/-/lodash.isboolean-3.0.3.tgz#6c2e171db2a257cd96802fd43b01b20d5f5870f6"
+  integrity sha1-bC4XHbKiV82WgC/UOwGyDV9YcPY=
+
+lodash.isequal@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
+  integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
+
+lodash.isfunction@^3.0.9:
+  version "3.0.9"
+  resolved "https://registry.yarnpkg.com/lodash.isfunction/-/lodash.isfunction-3.0.9.tgz#06de25df4db327ac931981d1bdb067e5af68d051"
+  integrity sha512-AirXNj15uRIMMPihnkInB4i3NHeb4iBtNg9WRWuK2o31S+ePwwNmDPaTL3o7dTJ+VXNZim7rFs4rxN4YU1oUJw==
+
+lodash.isnil@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/lodash.isnil/-/lodash.isnil-4.0.0.tgz#49e28cd559013458c814c5479d3c663a21bfaa6c"
+  integrity sha1-SeKM1VkBNFjIFMVHnTxmOiG/qmw=
+
+lodash.isundefined@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/lodash.isundefined/-/lodash.isundefined-3.0.1.tgz#23ef3d9535565203a66cefd5b830f848911afb48"
+  integrity sha1-I+89lTVWUgOmbO/VuDD4SJEa+0g=
+
+lodash.uniq@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
+  integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
+
 lodash@^4.17.11, lodash@^4.17.4:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
@@ -1910,15 +1925,6 @@ object-copy@^0.1.0:
     define-property "^0.2.5"
     kind-of "^3.0.3"
 
-object-extended@0.0.7:
-  version "0.0.7"
-  resolved "https://registry.yarnpkg.com/object-extended/-/object-extended-0.0.7.tgz#84fd23f56b15582aeb3e88b05cb55d2432d68a33"
-  integrity sha1-hP0j9WsVWCrrPoiwXLVdJDLWijM=
-  dependencies:
-    array-extended "~0.0.4"
-    extended "~0.0.3"
-    is-extended "~0.0.3"
-
 object-visit@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/object-visit/-/object-visit-1.0.1.tgz#f79c4493af0c5377b59fe39d395e41042dd045bb"
@@ -2242,7 +2248,7 @@ safe-regex@^1.1.0:
   dependencies:
     ret "~0.1.10"
 
-"safer-buffer@>= 2.1.2 < 3", safer-buffer@^2.0.2, safer-buffer@^2.1.0, safer-buffer@^2.1.2, safer-buffer@~2.1.0:
+"safer-buffer@>= 2.1.2 < 3", safer-buffer@^2.0.2, safer-buffer@^2.1.0, safer-buffer@~2.1.0:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
@@ -2413,16 +2419,6 @@ streamroller@^1.0.5:
     fs-extra "^7.0.1"
     lodash "^4.17.11"
 
-string-extended@0.0.8:
-  version "0.0.8"
-  resolved "https://registry.yarnpkg.com/string-extended/-/string-extended-0.0.8.tgz#741957dff487b0272a79eec5a44f239ee6f17ccd"
-  integrity sha1-dBlX3/SHsCcqee7FpE8jnubxfM0=
-  dependencies:
-    array-extended "~0.0.5"
-    date-extended "~0.0.3"
-    extended "~0.0.3"
-    is-extended "~0.0.3"
-
 string-width@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"