diff --git a/Cargo.lock b/Cargo.lock
index a8385aa..73602e3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -211,7 +211,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1374191e2dd25f9ae02e3aa95041ed5d747fc77b3c102b49fe2dd9a8117a6244"
 dependencies = [
- "num-bigint",
+ "num-bigint 0.2.6",
  "num-integer",
  "num-traits",
  "serde",
@@ -889,7 +889,7 @@ dependencies = [
  "byteorder",
  "chrono",
  "diesel_derives",
- "num-bigint",
+ "num-bigint 0.2.6",
  "num-integer",
  "num-traits",
  "pq-sys",
@@ -1516,7 +1516,7 @@ dependencies = [
  "lazy_static",
  "maplit",
  "mockall 0.8.3",
- "num-bigint",
+ "num-bigint 0.3.3",
  "num-traits",
  "num_cpus",
  "parking_lot 0.11.2",
@@ -2796,6 +2796,17 @@ name = "num-bigint"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"
+dependencies = [
+ "autocfg 1.0.1",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f6f7833f2cbf2360a6cfd58cd41a53aa7a90bd4c202f5b1c7dd2ed73c57b2c3"
 dependencies = [
  "autocfg 1.0.1",
  "num-integer",
diff --git a/graph/Cargo.toml b/graph/Cargo.toml
index 37c1d14..d3328b8 100644
--- a/graph/Cargo.toml
+++ b/graph/Cargo.toml
@@ -29,7 +29,7 @@ futures = "0.1.21"
 graphql-parser = "0.3.0"
 lazy_static = "1.4.0"
 mockall = "0.8.3"
-num-bigint = { version = "^0.2.6", features = ["serde"] }
+num-bigint = { version = "^0.3.3", features = ["serde"] }
 num_cpus = "1.13.0"
 num-traits = "0.2.14"
 rand = "0.6.1"