diff --git a/.github/workflows/ci-docs.yml b/.github/workflows/ci-docs.yml
index 57a134e79d5..cdf98e4a30c 100644
--- a/.github/workflows/ci-docs.yml
+++ b/.github/workflows/ci-docs.yml
@@ -90,7 +90,7 @@ jobs:
       # We only use a non-zero build # when making multiple manual builds in one day.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
diff --git a/.github/workflows/ci-package.yml b/.github/workflows/ci-package.yml
index 3df7e7c2388..c1f8481c4ae 100644
--- a/.github/workflows/ci-package.yml
+++ b/.github/workflows/ci-package.yml
@@ -103,7 +103,7 @@ jobs:
       # We only use a non-zero build # when making multiple manual builds in one day.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
@@ -196,7 +196,7 @@ jobs:
       # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
@@ -285,7 +285,7 @@ jobs:
       # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
@@ -374,7 +374,7 @@ jobs:
       # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
@@ -457,7 +457,7 @@ jobs:
       # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER=10.94.$((`git log -n 1 --format=%ct` / (60*60*24)))
+          export VERSION_NUMBER=11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
         fi
@@ -541,7 +541,7 @@ jobs:
       # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
       run: |
         if test -z "${{ github.event.inputs.version }}"; then
-          export VERSION_NUMBER="10.93.$((`git log -n 1 --format=%ct` / (60*60*24)))"
+          export VERSION_NUMBER="11.0.$((`git log -n 1 --format=%ct` / (60*60*24)))"
           export PREFIX="cronbuild-"
         else
           export VERSION_NUMBER=${{ github.event.inputs.version }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88f32edc9ce..a3e2143078f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -575,7 +575,7 @@ endif (EXISTS "${PROJECT_SOURCE_DIR}/.svn")
 
 # N.B.: When updating this, update all the default versions in ci-package.yml
 # and ci-docs.yml.  We should find a way to share (xref i#1565).
-set(VERSION_NUMBER_DEFAULT "10.94.${VERSION_NUMBER_PATCHLEVEL}")
+set(VERSION_NUMBER_DEFAULT "11.0.${VERSION_NUMBER_PATCHLEVEL}")
 # do not store the default VERSION_NUMBER in the cache to prevent a stale one
 # from preventing future version updates in a pre-existing build dir
 set(VERSION_NUMBER "" CACHE STRING "Version number: leave empty for default")
@@ -1397,7 +1397,7 @@ math(EXPR VERSION_NUMBER_INTEGER
   "${VERSION_NUMBER_MAJOR}*100 + ${VERSION_NUMBER_MINOR}")
 
 # Every release since has had minor compat breakages: see api/docs/release.dox.
-set(OLDEST_COMPATIBLE_VERSION_DEFAULT "1000")
+set(OLDEST_COMPATIBLE_VERSION_DEFAULT "1100")
 set(OLDEST_COMPATIBLE_VERSION "" CACHE STRING
   "Oldest compatible version: leave empty for default")
 if ("${OLDEST_COMPATIBLE_VERSION}" STREQUAL "")