diff --git a/Cargo.toml b/Cargo.toml
index 037f4bc3..1cf68462 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ chrono = "0.4"
 error-chain = { git = "https://github.com/rnewman/error-chain", branch = "rnewman/sync" }
 lazy_static = "0.2"
 time = "0.1"
-uuid = "0.5"
+uuid = { version = "0.5", features = ["v4", "serde"] }
 
 [dependencies.rusqlite]
 version = "0.13"
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 5b768226..96a217bd 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -9,7 +9,7 @@ enum-set = { git = "https://github.com/rnewman/enum-set" }
 lazy_static = "0.2"
 num = "0.1"
 ordered-float = { version = "0.5", features = ["serde"] }
-uuid = "0.5"
+uuid = { version = "0.5", features = ["v4", "serde"] }
 serde = { version = "1.0", features = ["rc"] }
 serde_derive = "1.0"
 
diff --git a/edn/Cargo.toml b/edn/Cargo.toml
index 99e1a57e..ed824bb8 100644
--- a/edn/Cargo.toml
+++ b/edn/Cargo.toml
@@ -16,7 +16,7 @@ itertools = "0.7"
 num = "0.1"
 ordered-float = "0.5"
 pretty = "0.2"
-uuid = "0.5"
+uuid = { version = "0.5", features = ["v4", "serde"] }
 serde = { version = "1.0", optional = true }
 serde_derive = { version = "1.0", optional = true }