diff --git a/builds/cmake/CMakeLists.txt b/builds/cmake/CMakeLists.txt
index 250e7ac1..d62c5da2 100644
--- a/builds/cmake/CMakeLists.txt
+++ b/builds/cmake/CMakeLists.txt
@@ -481,7 +481,7 @@ endif()
 
 # Find boost
 #------------------------------------------------------------------------------
-find_package( Boost 1.72.0 REQUIRED COMPONENTS
+find_package( Boost 1.73.0 REQUIRED COMPONENTS
     unit_test_framework )
 
 set( boost_unit_test_framework_LIBS "-lboost_unit_test_framework" )
diff --git a/builds/msvc/vs2022/libbitcoin-consensus-test/libbitcoin-consensus-test.vcxproj b/builds/msvc/vs2022/libbitcoin-consensus-test/libbitcoin-consensus-test.vcxproj
index 97cf1146..74ce84ef 100644
--- a/builds/msvc/vs2022/libbitcoin-consensus-test/libbitcoin-consensus-test.vcxproj
+++ b/builds/msvc/vs2022/libbitcoin-consensus-test/libbitcoin-consensus-test.vcxproj
@@ -85,16 +85,16 @@
   <ImportGroup Label="ExtensionTargets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="$(NuGetPackageRoot)secp256k1_vc141.0.1.0.19\build\native\secp256k1_vc141.targets" Condition="Exists('$(NuGetPackageRoot)secp256k1_vc141.0.1.0.19\build\native\secp256k1_vc141.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost.1.72.0.0\build\boost.targets" Condition="Exists('$(NuGetPackageRoot)boost.1.72.0.0\build\boost.targets')" />
-    <Import Project="$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.72.0.0\build\boost_unit_test_framework-vc141.targets" Condition="Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.72.0.0\build\boost_unit_test_framework-vc141.targets')" />
+    <Import Project="$(NuGetPackageRoot)boost.1.73.0.0\build\boost.targets" Condition="Exists('$(NuGetPackageRoot)boost.1.73.0.0\build\boost.targets')" />
+    <Import Project="$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.73.0.0\build\boost_unit_test_framework-vc141.targets" Condition="Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.73.0.0\build\boost_unit_test_framework-vc141.targets')" />
   </ImportGroup>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('$(NuGetPackageRoot)secp256k1_vc141.0.1.0.19\build\native\secp256k1_vc141.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)secp256k1_vc141.0.1.0.19\build\native\secp256k1_vc141.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost.1.72.0.0\build\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost.1.72.0.0\build\boost.targets'))" />
-    <Error Condition="!Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.72.0.0\build\boost_unit_test_framework-vc141.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.72.0.0\build\boost_unit_test_framework-vc141.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)boost.1.73.0.0\build\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost.1.73.0.0\build\boost.targets'))" />
+    <Error Condition="!Exists('$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.73.0.0\build\boost_unit_test_framework-vc141.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(NuGetPackageRoot)boost_unit_test_framework-vc141.1.73.0.0\build\boost_unit_test_framework-vc141.targets'))" />
   </Target>
   <ItemGroup>
     <ProjectReference Include="..\libbitcoin-consensus\libbitcoin-consensus.vcxproj">
diff --git a/builds/msvc/vs2022/libbitcoin-consensus-test/packages.config b/builds/msvc/vs2022/libbitcoin-consensus-test/packages.config
index 6fe56650..89fb7d72 100644
--- a/builds/msvc/vs2022/libbitcoin-consensus-test/packages.config
+++ b/builds/msvc/vs2022/libbitcoin-consensus-test/packages.config
@@ -7,6 +7,6 @@
  -->
 <packages>
   <package id="secp256k1_vc141" version="0.1.0.19" targetFramework="Native" />
-  <package id="boost" version="1.72.0.0" targetFramework="Native" />
-  <package id="boost_unit_test_framework-vc141" version="1.72.0.0" targetFramework="Native" />
+  <package id="boost" version="1.73.0.0" targetFramework="Native" />
+  <package id="boost_unit_test_framework-vc141" version="1.73.0.0" targetFramework="Native" />
 </packages>
diff --git a/configure.ac b/configure.ac
index 46a5f489..23aabfa8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -454,17 +454,17 @@ AS_CASE([${CC}], [*clang*],
 
 # Check dependencies.
 #==============================================================================
-# Require Boost of at least version 1.72.0 and output ${boost_CPPFLAGS/LDFLAGS}.
+# Require Boost of at least version 1.73.0 and output ${boost_CPPFLAGS/LDFLAGS}.
 #------------------------------------------------------------------------------
 AS_CASE([${CC}], [*],
-    [AX_BOOST_BASE([1.72.0],
+    [AX_BOOST_BASE([1.73.0],
         [AC_SUBST([boost_CPPFLAGS], [${BOOST_CPPFLAGS}])
          AC_SUBST([boost_ISYS_CPPFLAGS], [`echo ${BOOST_CPPFLAGS} | $SED s/^-I/-isystem/g | $SED s/' -I'/' -isystem'/g`])
          AC_SUBST([boost_LDFLAGS], [${BOOST_LDFLAGS}])
          AC_MSG_NOTICE([boost_CPPFLAGS : ${boost_CPPFLAGS}])
          AC_MSG_NOTICE([boost_ISYS_CPPFLAGS : ${boost_ISYS_CPPFLAGS}])
          AC_MSG_NOTICE([boost_LDFLAGS : ${boost_LDFLAGS}])],
-        [AC_MSG_ERROR([Boost 1.72.0 or later is required but was not found.])])])
+        [AC_MSG_ERROR([Boost 1.73.0 or later is required but was not found.])])])
 
 AS_CASE([${enable_isystem}],[yes],
     [AC_SUBST([boost_BUILD_CPPFLAGS], [${boost_ISYS_CPPFLAGS}])],
diff --git a/install-cmake.sh b/install-cmake.sh
index 3e4d4708..e6b29fdc 100755
--- a/install-cmake.sh
+++ b/install-cmake.sh
@@ -51,8 +51,8 @@ PRESUMED_CI_PROJECT_PATH=$(pwd)
 
 # Boost archive.
 #------------------------------------------------------------------------------
-BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.72.0/boost_1_72_0.tar.bz2"
-BOOST_ARCHIVE="boost_1_72_0.tar.bz2"
+BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.73.0/boost_1_73_0.tar.bz2"
+BOOST_ARCHIVE="boost_1_73_0.tar.bz2"
 
 
 # Define utility functions.
diff --git a/install-cmakepresets.sh b/install-cmakepresets.sh
index ee244224..51fddbe9 100755
--- a/install-cmakepresets.sh
+++ b/install-cmakepresets.sh
@@ -57,8 +57,8 @@ PRESUMED_CI_PROJECT_PATH=$(pwd)
 
 # Boost archive.
 #------------------------------------------------------------------------------
-BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.72.0/boost_1_72_0.tar.bz2"
-BOOST_ARCHIVE="boost_1_72_0.tar.bz2"
+BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.73.0/boost_1_73_0.tar.bz2"
+BOOST_ARCHIVE="boost_1_73_0.tar.bz2"
 
 
 # Define utility functions.
diff --git a/install.sh b/install.sh
index bd37f48c..2856f621 100755
--- a/install.sh
+++ b/install.sh
@@ -51,8 +51,8 @@ PRESUMED_CI_PROJECT_PATH=$(pwd)
 
 # Boost archive.
 #------------------------------------------------------------------------------
-BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.72.0/boost_1_72_0.tar.bz2"
-BOOST_ARCHIVE="boost_1_72_0.tar.bz2"
+BOOST_URL="http://downloads.sourceforge.net/project/boost/boost/1.73.0/boost_1_73_0.tar.bz2"
+BOOST_ARCHIVE="boost_1_73_0.tar.bz2"
 
 
 # Define utility functions.