diff --git a/Cargo.lock b/Cargo.lock
index 0cf47febc3..7cf0196d4d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -306,9 +306,15 @@ dependencies = [
  "ndarray",
  "num-complex",
  "num-traits",
- "pyo3",
+ "pyo3 0.12.4",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
+
 [[package]]
 name = "parking_lot"
 version = "0.11.1"
@@ -391,7 +397,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf6bbbe8f70d179260b3728e5d04eb012f4f0c7988e58c11433dd689cecaa72e"
 dependencies = [
  "ctor",
- "hashbrown",
  "indoc",
  "inventory",
  "libc",
@@ -401,6 +406,32 @@ dependencies = [
  "unindent",
 ]
 
+[[package]]
+name = "pyo3"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64664505ce285a59b8b7e940fbe54ad65b1758a0810eddc5bc26df6f6ec8c557"
+dependencies = [
+ "cfg-if 1.0.0",
+ "hashbrown",
+ "indoc",
+ "libc",
+ "parking_lot",
+ "paste",
+ "pyo3-build-config",
+ "pyo3-macros",
+ "unindent",
+]
+
+[[package]]
+name = "pyo3-build-config"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f1e4a72de84cdcd69f62211b62f62753d0c11b7b5715f3467f3754dab22a7ca"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "pyo3-derive-backend"
 version = "0.12.4"
@@ -412,6 +443,29 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "pyo3-macros"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "244f21d0a3887a9c02018b94e3b78d693dc7eca5c56839b7796a499cc364deb4"
+dependencies = [
+ "pyo3-macros-backend",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pyo3-macros-backend"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3d3d18ac41d05199bb82645d56e39f8c8b4909a0137c6f2640f03685b29f672"
+dependencies = [
+ "proc-macro2",
+ "pyo3-build-config",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "pyo3cls"
 version = "0.12.4"
@@ -527,7 +581,7 @@ dependencies = [
  "ndarray",
  "numpy",
  "petgraph",
- "pyo3",
+ "pyo3 0.15.0",
  "rand",
  "rand_pcg",
  "rayon",
diff --git a/Cargo.toml b/Cargo.toml
index 6fa1831bc2..e0bbce84b1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ rand_pcg = "0.3"
 rayon = "1.5"
 
 [dependencies.pyo3]
-version = "0.12.3"
+version = "0.15.0"
 features = ["extension-module", "hashbrown"]
 
 [dependencies.hashbrown]