diff --git a/Cargo.lock b/Cargo.lock
index 48fb3473c..86f0eab7f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -248,7 +248,7 @@ dependencies = [
 [[package]]
 name = "pyo3"
 version = "0.18.1"
-source = "git+https://github.com/PyO3/pyo3?rev=ec2485bb7dadbed602f286efba9e0900bbcbd50d#ec2485bb7dadbed602f286efba9e0900bbcbd50d"
+source = "git+https://github.com/PyO3/pyo3?branch=release-0.18.1#184c085f54deced70d630a388788fbe3a644b492"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -264,7 +264,7 @@ dependencies = [
 [[package]]
 name = "pyo3-build-config"
 version = "0.18.1"
-source = "git+https://github.com/PyO3/pyo3?rev=ec2485bb7dadbed602f286efba9e0900bbcbd50d#ec2485bb7dadbed602f286efba9e0900bbcbd50d"
+source = "git+https://github.com/PyO3/pyo3?branch=release-0.18.1#184c085f54deced70d630a388788fbe3a644b492"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -273,7 +273,7 @@ dependencies = [
 [[package]]
 name = "pyo3-ffi"
 version = "0.18.1"
-source = "git+https://github.com/PyO3/pyo3?rev=ec2485bb7dadbed602f286efba9e0900bbcbd50d#ec2485bb7dadbed602f286efba9e0900bbcbd50d"
+source = "git+https://github.com/PyO3/pyo3?branch=release-0.18.1#184c085f54deced70d630a388788fbe3a644b492"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -282,7 +282,7 @@ dependencies = [
 [[package]]
 name = "pyo3-macros"
 version = "0.18.1"
-source = "git+https://github.com/PyO3/pyo3?rev=ec2485bb7dadbed602f286efba9e0900bbcbd50d#ec2485bb7dadbed602f286efba9e0900bbcbd50d"
+source = "git+https://github.com/PyO3/pyo3?branch=release-0.18.1#184c085f54deced70d630a388788fbe3a644b492"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -293,7 +293,7 @@ dependencies = [
 [[package]]
 name = "pyo3-macros-backend"
 version = "0.18.1"
-source = "git+https://github.com/PyO3/pyo3?rev=ec2485bb7dadbed602f286efba9e0900bbcbd50d#ec2485bb7dadbed602f286efba9e0900bbcbd50d"
+source = "git+https://github.com/PyO3/pyo3?branch=release-0.18.1#184c085f54deced70d630a388788fbe3a644b492"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index c3f78e567..77a57a2ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ include = [
 
 [dependencies]
 # required since `Py_Ellipsis` fails on windows, see https://github.com/PyO3/pyo3/pull/2911
-pyo3 = { git = "https://github.com/PyO3/pyo3", rev = "ec2485bb7dadbed602f286efba9e0900bbcbd50d" }
+pyo3 = { git = "https://github.com/PyO3/pyo3", branch = "release-0.18.1" }
 #pyo3 = "0.18.0"
 regex = "1.6.0"
 strum = { version = "0.24.1", features = ["derive"] }
@@ -68,5 +68,5 @@ strip = true
 version_check = "0.9.4"
 # used where logic has to be version/distribution specific, e.g. pypy
 # FIXME change when `pyo3` above is updated
-pyo3-build-config = { git = "https://github.com/PyO3/pyo3", rev = "ec2485bb7dadbed602f286efba9e0900bbcbd50d" }
+pyo3-build-config = { git = "https://github.com/PyO3/pyo3", branch = "release-0.18.1" }
 #pyo3 = "0.18.0"