diff --git a/Cargo.lock b/Cargo.lock
index 4aa0c64..e3e411f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1188,7 +1188,7 @@ checksum = "180f724d496e84764e8ecf28fbe1da74ef231ec4ba15be65a9100be8445d73e3"
 dependencies = [
  "ndarray",
  "rand 0.9.4",
- "rand_distr",
+ "rand_distr 0.5.1",
 ]
 
 [[package]]
@@ -1569,6 +1569,16 @@ dependencies = [
  "rand 0.9.4",
 ]
 
+[[package]]
+name = "rand_distr"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d431c2703ccf129de4d45253c03f49ebb22b97d6ad79ee3ecfc7e3f4862c1d8"
+dependencies = [
+ "num-traits",
+ "rand 0.10.1",
+]
+
 [[package]]
 name = "rand_xorshift"
 version = "0.4.0"