diff --git a/VERSION.txt b/VERSION.txt
index 0c5f5563dc4..d44f31ea138 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-SageMath version 9.1.beta0, Release Date: 2020-01-10
+SageMath version 9.1.beta1, Release Date: 2020-01-21
diff --git a/build/pkgs/configure/checksums.ini b/build/pkgs/configure/checksums.ini
index 33c48ea3df6..1537fb00361 100644
--- a/build/pkgs/configure/checksums.ini
+++ b/build/pkgs/configure/checksums.ini
@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=3506adf8c82496e255cfdbbdcf29834dfe304972
-md5=5025184149d48727710a67a8cff91387
-cksum=914476400
+sha1=029fe778cefcb82231353c0dab72a75769ffdcf9
+md5=b4231b3e4ce67fc656ba9532b123485a
+cksum=3808756319
diff --git a/build/pkgs/configure/package-version.txt b/build/pkgs/configure/package-version.txt
index 172262e9837..ce2624fb22f 100644
--- a/build/pkgs/configure/package-version.txt
+++ b/build/pkgs/configure/package-version.txt
@@ -1 +1 @@
-c17110f970d3b0d8b0857cd02edd96b8f03430ef
+4fd5d56ecea2c81d58e9e43bd5f07b05e863bc7c
diff --git a/src/bin/sage-version.sh b/src/bin/sage-version.sh
index 57f8fb95cc0..dc09574db4e 100644
--- a/src/bin/sage-version.sh
+++ b/src/bin/sage-version.sh
@@ -1,5 +1,5 @@
 # Sage version information for shell scripts
 # This file is auto-generated by the sage-update-version script, do not edit!
-SAGE_VERSION='9.1.beta0'
-SAGE_RELEASE_DATE='2020-01-10'
-SAGE_VERSION_BANNER='SageMath version 9.1.beta0, Release Date: 2020-01-10'
+SAGE_VERSION='9.1.beta1'
+SAGE_RELEASE_DATE='2020-01-21'
+SAGE_VERSION_BANNER='SageMath version 9.1.beta1, Release Date: 2020-01-21'
diff --git a/src/sage/version.py b/src/sage/version.py
index dafb2c7d3f4..48c223a1d1d 100644
--- a/src/sage/version.py
+++ b/src/sage/version.py
@@ -1,5 +1,5 @@
 # Sage version information for Python scripts
 # This file is auto-generated by the sage-update-version script, do not edit!
-version = '9.1.beta0'
-date = '2020-01-10'
-banner = 'SageMath version 9.1.beta0, Release Date: 2020-01-10'
+version = '9.1.beta1'
+date = '2020-01-21'
+banner = 'SageMath version 9.1.beta1, Release Date: 2020-01-21'