diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 18)
-define(_CLIENT_VERSION_REVISION, 4)
+define(_CLIENT_VERSION_REVISION, 5)
 define(_CLIENT_VERSION_BUILD, 0)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2018)
diff --git a/doc/Doxyfile b/doc/Doxyfile
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -38,7 +38,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.18.4
+PROJECT_NUMBER         = 0.18.5
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -1,6 +1,5 @@
-Bitcoin ABC version 0.18.4 is now available from:
+Bitcoin ABC version 0.18.5 is now available from:
 
-  <https://download.bitcoinabc.org/0.18.4/>
+  <https://download.bitcoinabc.org/0.18.5/>
 
 This release includes the following features and fixes:
-  - Fixes an issue with `getblocktemplate` returning fees and sigops in non-CTOR ordering after Nov 15th CTOR activation.
diff --git a/doc/release-notes.md b/doc/release-notes/release-notes-0.18.4.md
copy from doc/release-notes.md
copy to doc/release-notes/release-notes-0.18.4.md
diff --git a/src/clientversion.h b/src/clientversion.h
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -18,7 +18,7 @@
 //! requires it
 #define CLIENT_VERSION_MAJOR 0
 #define CLIENT_VERSION_MINOR 18
-#define CLIENT_VERSION_REVISION 4
+#define CLIENT_VERSION_REVISION 5
 #define CLIENT_VERSION_BUILD 0
 
 //! Set to true for release, false for prerelease or test build
diff --git a/src/config/CMakeLists.txt b/src/config/CMakeLists.txt
--- a/src/config/CMakeLists.txt
+++ b/src/config/CMakeLists.txt
@@ -13,7 +13,7 @@
 # Version
 set(CLIENT_VERSION_MAJOR 0)
 set(CLIENT_VERSION_MINOR 18)
-set(CLIENT_VERSION_REVISION 4)
+set(CLIENT_VERSION_REVISION 5)
 set(CLIENT_VERSION_BUILD 0)
 
 option(CLIENT_VERSION_IS_RELEASE "Build a release version" OFF)
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -22,7 +22,7 @@
 /**
  * Minimum free space (in GB) needed for data directory.
  */
-static const uint64_t BLOCK_CHAIN_SIZE = 180;
+static const uint64_t BLOCK_CHAIN_SIZE = 200;
 /**
  * Minimum free space (in GB) needed for data directory when pruned; Does not
  * include prune target.
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -198,7 +198,7 @@
 
     BOOST_CHECK_EQUAL(userAgent(config).size(), MAX_SUBVERSION_LENGTH);
     BOOST_CHECK_EQUAL(userAgent(config),
-                      "/Bitcoin ABC:0.18.4(EB8.0; very very very very very "
+                      "/Bitcoin ABC:0.18.5(EB8.0; very very very very very "
                       "very very very very very very very very very very very "
                       "very very very very very very very very very very very "
                       "very very very very very very very very very very very "