diff --git a/Cargo.toml b/Cargo.toml
index 366668b..5569a8d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ dss = []
 
 [dependencies]
 base64 = "0.9.0"
-rand = "^0.3"
+rand = "^0.4.2"
 ring = "^0.12"
 merkle_sigs = "^1.4"
 protobuf = ">= 1.4, < 1.6"
@@ -63,4 +63,3 @@ tag-prefix = "v"
 tag-message = "Release version {{version}}."
 doc-commit-message = "Update documentation."
 dev-version-ext = "pre"
-