diff --git a/package.json b/package.json
index 9614491855c718115ddd4a78de5aeb40d5817b62..976a6912072bbcfd01950d6d46b7f9f04ccad0d0 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "unzip": "0.1.11",
     "unzip2": "0.2.5",
     "winston": "2.3.1",
-    "wotb": "0.5.5"
+    "wotb": "0.5.x"
   },
   "devDependencies": {
     "coveralls": "2.11.4",
diff --git a/yarn.lock b/yarn.lock
index 757a62fa66ed3f0801825fb68e9a826528eaac27..4d5084ad634683c3d51e23e02902f34e62616cf2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -704,7 +704,7 @@ doctrine@^1.2.2:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
-duniter-bma@^1.1.0, duniter-bma@^1.1.2:
+duniter-bma@1.1.2, duniter-bma@^1.1.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/duniter-bma/-/duniter-bma-1.1.2.tgz#179e24e70d7dcfcedebdc26a211e42ce1714bf4c"
   dependencies:
@@ -751,9 +751,9 @@ duniter-crawler@1.1.4, duniter-crawler@^1.1.0:
     request-promise "4.2.0"
     underscore "1.8.3"
 
-duniter-keypair@^1.1.3:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/duniter-keypair/-/duniter-keypair-1.1.4.tgz#b1bd549e4f92acd3908d3dbda26791cec929ac9a"
+duniter-keypair@1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/duniter-keypair/-/duniter-keypair-1.1.3.tgz#2ed198e6097ad2ce5c929760cfe568a64137f90e"
   dependencies:
     bs58 "4.0.0"
     co "4.6.0"
@@ -765,7 +765,7 @@ duniter-keypair@^1.1.3:
     tweetnacl "0.14.5"
     tweetnacl-util "0.15.0"
 
-duniter-prover@^1.1.2:
+duniter-prover@1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/duniter-prover/-/duniter-prover-1.1.2.tgz#9b445ea074099b8d819c213ea4b42db035541a1e"
   dependencies:
@@ -872,11 +872,11 @@ escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
 
-escape-string-regexp@1.0.2:
+escape-string-regexp@1.0.2, escape-string-regexp@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.2.tgz#4dbc2fe674e71949caf3fb2695ce7f2dc1d9a8d1"
 
-escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
+escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
@@ -3057,11 +3057,11 @@ tweetnacl-util@0.15.0:
   version "0.15.0"
   resolved "https://registry.yarnpkg.com/tweetnacl-util/-/tweetnacl-util-0.15.0.tgz#4576c1cee5e2d63d207fee52f1ba02819480bc75"
 
-tweetnacl@0.14.3:
+tweetnacl@0.14.3, tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   version "0.14.3"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.3.tgz#3da382f670f25ded78d7b3d1792119bca0b7132d"
 
-tweetnacl@0.14.5, tweetnacl@^0.14.3, tweetnacl@~0.14.0:
+tweetnacl@0.14.5:
   version "0.14.5"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
 
@@ -3228,9 +3228,9 @@ wordwrap@~0.0.2:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
 
-wotb@0.5.5:
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/wotb/-/wotb-0.5.5.tgz#ebc802c860a92143c7705904c43d4b972944c7eb"
+wotb@0.5.x:
+  version "0.5.7"
+  resolved "https://registry.yarnpkg.com/wotb/-/wotb-0.5.7.tgz#24b3c8d931533bf77971deceb85cecd2518c8316"
   dependencies:
     bindings "1.2.1"
     nan "2.2.0"