diff --git a/.github/actions/run-backend-tests/action.yml b/.github/actions/run-backend-tests/action.yml
index e3b94a4bb13..3a26a765bc2 100644
--- a/.github/actions/run-backend-tests/action.yml
+++ b/.github/actions/run-backend-tests/action.yml
@@ -208,7 +208,7 @@ runs:
 
         - name: Upload updated timing data as artifacts
           uses: actions/upload-artifact@v4
-          if: ${{ inputs.person-on-events != 'true' && inputs.clickhouse-server-image == 'altinity/clickhouse-server:24.3.5.47.altinitystable' }}
+          if: ${{ inputs.person-on-events != 'true' && inputs.clickhouse-server-image == 'clickhouse/clickhouse-server:24.4.4.113-alpine' }}
           with:
               name: timing_data-${{ inputs.segment }}-${{ inputs.group }}
               path: .test_durations
diff --git a/.github/workflows/ci-backend-update-test-timing.yml b/.github/workflows/ci-backend-update-test-timing.yml
index 1ac109ba2de..f87b11c8f91 100644
--- a/.github/workflows/ci-backend-update-test-timing.yml
+++ b/.github/workflows/ci-backend-update-test-timing.yml
@@ -29,13 +29,13 @@ jobs:
                   group: 1
                   token: ${{ secrets.POSTHOG_BOT_GITHUB_TOKEN }}
                   python-version: '3.11.9'
-                  clickhouse-server-image: 'altinity/clickhouse-server:24.3.5.47.altinitystable'
+                  clickhouse-server-image: 'clickhouse/clickhouse-server:24.4.4.113-alpine'
                   segment: 'FOSS'
                   person-on-events: false
 
             - name: Upload updated timing data as artifacts
               uses: actions/upload-artifact@v4
-              if: ${{ inputs.person-on-events != 'true' && inputs.clickhouse-server-image == 'altinity/clickhouse-server:24.3.5.47.altinitystable' }}
+              if: ${{ inputs.person-on-events != 'true' && inputs.clickhouse-server-image == 'clickhouse/clickhouse-server:24.4.4.113-alpine' }}
               with:
                   name: timing_data-${{ inputs.segment }}-${{ inputs.group }}
                   path: .test_durations
diff --git a/.github/workflows/ci-backend.yml b/.github/workflows/ci-backend.yml
index e4e89d38077..1a7b790066c 100644
--- a/.github/workflows/ci-backend.yml
+++ b/.github/workflows/ci-backend.yml
@@ -235,10 +235,7 @@ jobs:
             matrix:
                 python-version: ['3.11.9']
                 clickhouse-server-image:
-                    [
-                        'clickhouse/clickhouse-server:23.12.6.19-alpine',
-                        'altinity/clickhouse-server:24.3.5.47.altinitystable',
-                    ]
+                    ['clickhouse/clickhouse-server:23.12.6.19-alpine', 'clickhouse/clickhouse-server:24.4.4.113-alpine']
                 segment: ['Core']
                 person-on-events: [false, true]
                 # :NOTE: Keep concurrency and groups in sync
@@ -247,7 +244,7 @@ jobs:
                 include:
                     - segment: 'Temporal'
                       person-on-events: false
-                      clickhouse-server-image: 'altinity/clickhouse-server:24.3.5.47.altinitystable'
+                      clickhouse-server-image: 'clickhouse/clickhouse-server:24.4.4.113-alpine'
                       python-version: '3.11.9'
                       concurrency: 1
                       group: 1
@@ -319,10 +316,7 @@ jobs:
             fail-fast: false
             matrix:
                 clickhouse-server-image:
-                    [
-                        'clickhouse/clickhouse-server:23.12.6.19-alpine',
-                        'altinity/clickhouse-server:24.3.5.47.altinitystable',
-                    ]
+                    ['clickhouse/clickhouse-server:23.12.6.19-alpine', 'clickhouse/clickhouse-server:24.4.4.113-alpine']
         if: needs.changes.outputs.backend == 'true'
         runs-on: ubuntu-latest
         steps:
diff --git a/docker-compose.base.yml b/docker-compose.base.yml
index 4a105bfd3a2..b66de1478d6 100644
--- a/docker-compose.base.yml
+++ b/docker-compose.base.yml
@@ -79,7 +79,7 @@ services:
         # Note: please keep the default version in sync across
         #       `posthog` and the `charts-clickhouse` repos
         #
-        image: ${CLICKHOUSE_SERVER_IMAGE:-altinity/clickhouse-server:24.3.5.47.altinitystable}
+        image: ${CLICKHOUSE_SERVER_IMAGE:-clickhouse/clickhouse-server:24.4.4.113-alpine}
         restart: on-failure
 
     zookeeper:
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 6eaa159d3ff..35b8a5591c8 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -57,6 +57,7 @@ services:
             service: clickhouse
         ports:
             - '8123:8123'
+            - '8443:8443'
             - '9000:9000'
             - '9440:9440'
             - '9009:9009'
diff --git a/posthog/models/raw_sessions/sql.py b/posthog/models/raw_sessions/sql.py
index 4c060513dc7..a50d8227f82 100644
--- a/posthog/models/raw_sessions/sql.py
+++ b/posthog/models/raw_sessions/sql.py
@@ -89,17 +89,17 @@ CREATE TABLE IF NOT EXISTS {table_name} ON CLUSTER '{cluster}'
     -- verify correctness and as a backup. Ideally we will be able to delete the uniq columns in the future when we're
     -- satisfied that counts are accurate.
     pageview_count SimpleAggregateFunction(sum, Int64),
-    pageview_uniq AggregateFunction(uniq, Nullable(UUID)),
+    pageview_uniq AggregateFunction(uniq, UUID),
     autocapture_count SimpleAggregateFunction(sum, Int64),
-    autocapture_uniq AggregateFunction(uniq, Nullable(UUID)),
+    autocapture_uniq AggregateFunction(uniq, UUID),
     screen_count SimpleAggregateFunction(sum, Int64),
-    screen_uniq AggregateFunction(uniq, Nullable(UUID)),
+    screen_uniq AggregateFunction(uniq, UUID),
 
     -- replay
     maybe_has_session_replay SimpleAggregateFunction(max, Bool), -- will be written False to by the events table mv and True to by the replay table mv
 
     -- as a performance optimisation, also keep track of the uniq events for all of these combined, a bounce is a session with <2 of these
-    page_screen_autocapture_uniq_up_to AggregateFunction(uniqUpTo(1), Nullable(UUID)),
+    page_screen_autocapture_uniq_up_to AggregateFunction(uniqUpTo(1), UUID),
 
     -- web vitals
     vitals_lcp AggregateFunction(argMin, Nullable(Float64), DateTime64(6, 'UTC'))