diff --git a/lib/dl_connector_mysql/dl_connector_mysql/formula/definitions/functions_type.py b/lib/dl_connector_mysql/dl_connector_mysql/formula/definitions/functions_type.py
index df9332cfd..1c410ed3d 100644
--- a/lib/dl_connector_mysql/dl_connector_mysql/formula/definitions/functions_type.py
+++ b/lib/dl_connector_mysql/dl_connector_mysql/formula/definitions/functions_type.py
@@ -60,17 +60,17 @@
     ),
     base.FuncFloatFromDate(
         variants=[
-            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.FLOAT)),
+            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.DOUBLE)),
         ]
     ),
     base.FuncFloatFromDatetime(
         variants=[
-            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.FLOAT)),
+            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.DOUBLE)),
         ]
     ),
     base.FuncFloatFromGenericDatetime(
         variants=[
-            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.FLOAT)),
+            V(D.MYSQL, lambda value: sa.cast(sa.func.UNIX_TIMESTAMP(value), sa_mysql.DOUBLE)),
         ]
     ),
     # genericdatetime
diff --git a/lib/dl_connector_mysql/docker-compose.yml b/lib/dl_connector_mysql/docker-compose.yml
index aecf1174a..1e7940b45 100644
--- a/lib/dl_connector_mysql/docker-compose.yml
+++ b/lib/dl_connector_mysql/docker-compose.yml
@@ -13,10 +13,10 @@ services:
     ports:
       - "52000:3306"
   db-mysql-8-0:
-    # image: "mysql:8.0.12"
+    # image: "mysql:8.0.40"
     build:
       context: docker-compose
-      dockerfile: Dockerfile.db-mysql-8.0.12
+      dockerfile: Dockerfile.db-mysql-8.0.40
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: "1"
       MYSQL_DATABASE: "test_data"
diff --git a/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.12 b/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.12
deleted file mode 100644
index 595b4712b..000000000
--- a/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.12
+++ /dev/null
@@ -1,5 +0,0 @@
-# the earliest version supported by DL
-# FROM mysql:8.0.12
-FROM mysql:8.0.12@sha256:8fdc47e9ccb8112a62148032ae70484e3453b628ab6fe02bccf159e2966b750e
-
-COPY db-mysql/docker-entrypoint-initdb.d /docker-entrypoint-initdb.d
diff --git a/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.40 b/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.40
new file mode 100644
index 000000000..e371a5a9a
--- /dev/null
+++ b/lib/dl_connector_mysql/docker-compose/Dockerfile.db-mysql-8.0.40
@@ -0,0 +1,4 @@
+# FROM mysql:8.0.40
+FROM mysql:8.0.40@sha256:d58ac93387f644e4e040c636b8f50494e78e5afc27ca0a87348b2f577da2b7ff
+
+COPY db-mysql/docker-entrypoint-initdb.d /docker-entrypoint-initdb.d