diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5b56e5a0..848a2e63 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -206,6 +206,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        python-version: [ pypy-3.6, pypy-3.7, pypy-3.8 ]
         os: [ ubuntu-latest, macos-latest ]
     steps:
     - uses: actions/checkout@v2
@@ -221,7 +222,7 @@ jobs:
       run: cargo test --no-default-features --release
     - uses: actions/setup-python@v2
       with:
-        python-version: pypy-3.6
+        python-version: ${{ matrix.python-version }}
     - name: Install maturin
       run: pip install maturin
     - name: Build Wheels
diff --git a/Cargo.lock b/Cargo.lock
index 2a81f2c2..56a59434 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -161,9 +161,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.106"
+version = "0.2.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a60553f9a9e039a333b4e9b20573b9e9b9c0bb3a11e201ccc48ef4283456d673"
+checksum = "fbe5e23404da5b4f555ef85ebed98fb4083e55a00c317800bc2a50ede9f3d219"
 
 [[package]]
 name = "libmimalloc-sys"
@@ -274,8 +274,9 @@ dependencies = [
 
 [[package]]
 name = "numpy"
-version = "0.14.1"
-source = "git+https://github.com/PyO3/rust-numpy.git?branch=main#2cab9df30cf9cc1bb2f370cb069b87465308b1ea"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e590538dba8432d54d3587b06df73d7c044e83cfa4b200cbc7d0567f924ac0a7"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",