diff --git a/CHANGES.md b/CHANGES.md
index db488db8..eca3a7fc 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,10 +1,12 @@
-## Version 3.1.0 (2023/12/11)
+## Version 3.1.0 (2023/12/13)
 
 * Add `AnalyticDB` for a spatial database composed of analytic functions.
 * Add `CSGeoLocal` for local rotated geographic coordinate systems.
 * Switch from CppUnit to Catch2 for C++ testing framework.
 * Bugfixes
   - Update spatial database validateParameters() to use correct data member (self.label -> self.description).
+* Update Pyre requirement to version 1.1.0.
+* Update Python requirement to version 3.8 or later.
 
 ## Version 3.0.0 (2022/06/06)
 
diff --git a/configure.ac b/configure.ac
index 6800b759..ca590305 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,7 +93,7 @@ fi
 AM_CONDITIONAL([ENABLE_SCEC_CVM_H], [test "$enable_scec_cvm_h" != no])
 
 dnl Check for Python modules and packages.
-AM_PATH_PYTHON([3.6])
+AM_PATH_PYTHON([3.8])
 AC_ARG_VAR(PYTHON, [Python interpreter])
 AC_ARG_VAR(PYTHONPATH, [Python module search path])
 CIT_PYTHON_SYSCONFIG
@@ -101,7 +101,7 @@ CIT_CHECK_PYTHON_HEADER
 CIT_CHECK_PYTHON_SHARED
 
 dnl PYTHIA/PYRE
-CIT_PYTHON_MODULE([pythia],[1.0.0])
+CIT_PYTHON_MODULE([pythia],[1.1.0])
 
 dnl NUMPY
 CIT_NUMPY_PYTHON_MODULE
diff --git a/setup.cfg b/setup.cfg
index 3c951aba..a060ce93 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,7 +12,7 @@ license = MIT
 url = https://geodynamics.org/resources/spatialdata
 
 [options]
-python_requires = >=3.6
+python_requires = >=3.8
 
 packages = find: