diff --git a/CHANGELOG.md b/CHANGELOG.md
index 350226de..ab11c157 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Version History
 
+## 1.2.20
+
+* python-build: Add CPython 3.9.0b4 (#1654)
+
 ## 1.2.19
 
 * python-build: Add CPython 3.8.3 (#1612)
diff --git a/libexec/pyenv---version b/libexec/pyenv---version
index 456803c3..82b2d533 100755
--- a/libexec/pyenv---version
+++ b/libexec/pyenv---version
@@ -12,7 +12,7 @@
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
 
-version="1.2.19"
+version="1.2.20"
 git_revision=""
 
 if cd "${BASH_SOURCE%/*}" 2>/dev/null && git remote -v 2>/dev/null | grep -q pyenv; then
diff --git a/plugins/python-build/share/python-build/3.9.0b3 b/plugins/python-build/share/python-build/3.9.0b4
similarity index 53%
rename from plugins/python-build/share/python-build/3.9.0b3
rename to plugins/python-build/share/python-build/3.9.0b4
index 30f5a306..28d807fa 100644
--- a/plugins/python-build/share/python-build/3.9.0b3
+++ b/plugins/python-build/share/python-build/3.9.0b4
@@ -4,7 +4,7 @@ export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL=1
 install_package "openssl-1.1.0j" "https://www.openssl.org/source/old/1.1.0/openssl-1.1.0j.tar.gz#31bec6c203ce1a8e93d5994f4ed304c63ccf07676118b6634edded12ad1b3246" mac_openssl --if has_broken_mac_openssl
 install_package "readline-8.0" "https://ftpmirror.gnu.org/readline/readline-8.0.tar.gz#e339f51971478d369f8a053a330a190781acb9864cf4c541060f12078948e461" mac_readline --if has_broken_mac_readline
 if has_tar_xz_support; then
-    install_package "Python-3.9.0b3" "https://www.python.org/ftp/python/3.9.0/Python-3.9.0b3.tar.xz#af1d09f8f59d1329273c2970e3156e2f9949e5cd9c408264eba3ca84213c957f" ldflags_dirs standard verify_py38 copy_python_gdb ensurepip
+    install_package "Python-3.9.0b4" "https://www.python.org/ftp/python/3.9.0/Python-3.9.0b4.tar.xz#344634bc7f3327284ad1349699d289aafd85a426524651dffdd5eb6cec216304" ldflags_dirs standard verify_py39 copy_python_gdb ensurepip
 else
-    install_package "Python-3.9.0b3" "https://www.python.org/ftp/python/3.9.0/Python-3.9.0b3.tgz#d000aed311f4330fd5353247a1b76479d1851e6a6ccaeeba3f99256c9b449932" ldflags_dirs standard verify_py38 copy_python_gdb ensurepip
+    install_package "Python-3.9.0b4" "https://www.python.org/ftp/python/3.9.0/Python-3.9.0b4.tgz#35a4e086a824c2e07676f15a065345a4a5f3b610dedf20dbfc8cf91db880bc9d" ldflags_dirs standard verify_py39 copy_python_gdb ensurepip
 fi