diff --git a/Cargo.lock b/Cargo.lock
index 0cf47febc3..b610e5ab84 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -233,6 +233,15 @@ dependencies = [
  "rawpointer",
 ]
 
+[[package]]
+name = "matrixmultiply"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "add85d4dd35074e6fedc608f8c8f513a3548619a9024b751949ef0e8e45a4d84"
+dependencies = [
+ "rawpointer",
+]
+
 [[package]]
 name = "memoffset"
 version = "0.6.1"
@@ -248,8 +257,21 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac06db03ec2f46ee0ecdca1a1c34a99c0d188a0d83439b84bf0cb4b386e4ab09"
 dependencies = [
- "matrixmultiply",
- "num-complex",
+ "matrixmultiply 0.2.4",
+ "num-complex 0.2.4",
+ "num-integer",
+ "num-traits",
+ "rawpointer",
+]
+
+[[package]]
+name = "ndarray"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dec23e6762830658d2b3d385a75aa212af2f67a4586d4442907144f3bb6a1ca8"
+dependencies = [
+ "matrixmultiply 0.3.2",
+ "num-complex 0.4.0",
  "num-integer",
  "num-traits",
  "rawpointer",
@@ -266,6 +288,15 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-complex"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26873667bbbb7c5182d4a37c1add32cdf09f841af72da53318fdb81543c15085"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.44"
@@ -303,8 +334,8 @@ checksum = "9fd9e8e652becf4ba6c11803945f8bf463c23f482f704bb33f70ae9d22482d10"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
- "ndarray",
- "num-complex",
+ "ndarray 0.13.1",
+ "num-complex 0.2.4",
  "num-traits",
  "pyo3",
 ]
@@ -524,7 +555,7 @@ version = "0.8.0"
 dependencies = [
  "fixedbitset",
  "hashbrown",
- "ndarray",
+ "ndarray 0.15.4",
  "numpy",
  "petgraph",
  "pyo3",
diff --git a/Cargo.toml b/Cargo.toml
index 6fa1831bc2..9ff9c7536d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -33,7 +33,7 @@ version = "0.9"
 features = ["rayon"]
 
 [dependencies.ndarray]
-version = "^0.13.0"
+version = "^0.15.4"
 features = ["rayon"]
 
 [profile.release]