diff --git a/.github/workflows/oracle-xe-adapter-tests.yml b/.github/workflows/oracle-xe-adapter-tests.yml
index e6544ab..4ab579e 100644
--- a/.github/workflows/oracle-xe-adapter-tests.yml
+++ b/.github/workflows/oracle-xe-adapter-tests.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     services:
       oracle_db_xe:
diff --git a/Makefile b/Makefile
index 4cd83df..4a66204 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # Configuration variables
-VERSION=1.8.3
+VERSION=1.8.4
 PROJ_DIR?=$(shell pwd)
 VENV_DIR?=${PROJ_DIR}/.bldenv
 BUILD_DIR=${PROJ_DIR}/build
diff --git a/dbt/adapters/oracle/__version__.py b/dbt/adapters/oracle/__version__.py
index 6f8ca09..791f67d 100644
--- a/dbt/adapters/oracle/__version__.py
+++ b/dbt/adapters/oracle/__version__.py
@@ -14,4 +14,4 @@
   See the License for the specific language governing permissions and
   limitations under the License.
 """
-version = "1.8.3"
+version = "1.8.4"
diff --git a/dbt/include/oracle/macros/adapters.sql b/dbt/include/oracle/macros/adapters.sql
index 84ab91a..9d254c2 100644
--- a/dbt/include/oracle/macros/adapters.sql
+++ b/dbt/include/oracle/macros/adapters.sql
@@ -159,9 +159,9 @@
           {%- set sql = get_select_subquery(sql) %}
       {% endif %}
       {% if temporary -%} on commit preserve rows {%- endif %}
+      {% if parallel %} parallel {{ parallel }}{% endif %}
       {% if not temporary -%}
         {% if partition_clause %} {{ partition_clause }} {% endif %}
-        {% if parallel %} parallel {{ parallel }}{% endif %}
         {% if compression_clause %} {{ compression_clause }} {% endif %}
       {%- endif %}
       as
diff --git a/dbt/include/oracle/macros/materializations/snapshot/snapshot.sql b/dbt/include/oracle/macros/materializations/snapshot/snapshot.sql
index 9036757..6a85fb1 100644
--- a/dbt/include/oracle/macros/materializations/snapshot/snapshot.sql
+++ b/dbt/include/oracle/macros/materializations/snapshot/snapshot.sql
@@ -164,7 +164,7 @@
         {{ strategy.scd_id }} as dbt_scd_id,
         {{ strategy.updated_at }} as dbt_updated_at,
         {{ strategy.updated_at }} as dbt_valid_from,
-        cast(nullif({{ strategy.updated_at }}, {{ strategy.updated_at }}) as DATE) as dbt_valid_to
+        cast(nullif({{ strategy.updated_at }}, {{ strategy.updated_at }}) as TIMESTAMP(9)) as dbt_valid_to
     from (
         {{ sql }}
     ) sbq
diff --git a/dbt/include/oracle/macros/update_legacy_snapshots.sql b/dbt/include/oracle/macros/update_legacy_snapshots.sql
new file mode 100644
index 0000000..8d87713
--- /dev/null
+++ b/dbt/include/oracle/macros/update_legacy_snapshots.sql
@@ -0,0 +1,70 @@
+{#
+ Copyright (c) 2024, Oracle and/or its affiliates.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+     https://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+#}
+
+{#
+ Legacy hash function ORA_HASH is known to have collisions in large datasets
+ causing errors in snapshot merge statement. Please check the below Github
+ issues:
+
+    https://github.com/oracle/dbt-oracle/issues/52
+    https://github.com/oracle/dbt-oracle/issues/102
+
+This hash function is used in the marcro oracle__snapshot_hash_arguments
+
+dbt-oracle 1.9 will switch to a stronger hash function - SHA256. Changing the
+hash function will invalidate existing snapshots.These helper macros will
+ensure a smoother transition to dbt-oracle 1.9.
+
+It is recommended for teams to switch to SHA256 hash function before
+dbt-oracle 1.9 using a 2-step process:
+1. Create a macro oracle__snapshot_hash_arguments(args) in your dbt project
+   Copy paste the contents of macro
+   oracle__snapshot_standard_hash_arguments(args) shown below. This will become
+   the default from dbt-oracle 1.9
+
+2. Run the following operation on your snapshot table
+
+dbt --debug run-operation update_legacy_dbt_scd_id \
+    --args '{snapshot_table: PROMOTION_COSTS_SNAPSHOT, cols: ["promo_id", "dbt_updated_at"]}'
+
+#}
+
+{% macro oracle__snapshot_standard_hash_arguments(args) -%}
+    STANDARD_HASH({%- for arg in args -%}
+        coalesce(cast({{ arg }} as varchar(4000) ), '')
+        {% if not loop.last %} || '|' || {% endif %}
+    {%- endfor -%}, 'SHA256')
+{%- endmacro %}
+
+
+{% macro update_legacy_dbt_scd_id(snapshot_table, cols) -%}
+
+   {%- call statement('update_legacy_dbt_scd_id_dtype') -%}
+    BEGIN
+        UPDATE {{ snapshot_table }} SET DBT_SCD_ID = NULL;
+        COMMIT;
+        EXECUTE IMMEDIATE 'ALTER TABLE {{ snapshot_table }} MODIFY (dbt_scd_id RAW(32))';
+    END;
+    {%- endcall -%}
+
+    {%- call statement('update_legacy_dbt_scd_id') -%}
+    BEGIN
+        UPDATE {{ snapshot_table }}
+        SET dbt_scd_id = {{ oracle__snapshot_standard_hash_arguments(cols) }};
+        COMMIT;
+    END;
+    {%- endcall -%}
+{%- endmacro %}
diff --git a/requirements.txt b/requirements.txt
index c176417..3b0fccd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 dbt-common>=1.1.0,<2.0
 dbt-adapters>=1.2.1,<2.0
 dbt-core>=1.8.1,<2.0
-oracledb==2.4.1
+oracledb==2.5.1
diff --git a/setup.cfg b/setup.cfg
index 422b8cc..bbe8d32 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = dbt-oracle
-version = 1.8.3
+version = 1.8.4
 description = dbt (data build tool) adapter for Oracle Autonomous Database
 long_description = file: README.md
 long_description_content_type = text/markdown
@@ -12,7 +12,6 @@ classifiers =
     Intended Audience :: Developers
     License :: OSI Approved :: Apache Software License
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
@@ -28,7 +27,7 @@ project_urls =
     Release Notes = https://github.com/oracle/dbt-oracle/releases
 
 [options]
-python_requires = >=3.8
+python_requires = >=3.9
 zip_safe = False
 packages = find_namespace:
 include_package_data = True
@@ -36,7 +35,7 @@ install_requires =
     dbt-common>=1.1.0,<2.0
     dbt-adapters>=1.2.1,<2.0
     dbt-core~=1.8,<1.9
-    oracledb==2.4.1
+    oracledb==2.5.1
 test_suite=tests
 test_requires =
     dbt-tests-adapter~=1.8,<1.9
diff --git a/setup.py b/setup.py
index 332cc03..f8cb5f5 100644
--- a/setup.py
+++ b/setup.py
@@ -29,9 +29,9 @@
 
 
 # lockstep with dbt-core which requires Python > 3.8
-if sys.version_info < (3, 8):
+if sys.version_info < (3, 9):
     print("Error: dbt-oracle does not support this version of Python.")
-    print("Please upgrade to Python 3.8 or higher.")
+    print("Please upgrade to Python 3.9 or higher.")
     sys.exit(1)
 
 
@@ -43,7 +43,7 @@
         "dbt-common>=1.1.0,<2.0",
         "dbt-adapters>=1.2.1,<2.0",
         "dbt-core~=1.8,<1.9",
-        "oracledb==2.4.1"
+        "oracledb==2.5.1"
 ]
 
 test_requirements = [
@@ -61,17 +61,16 @@
 
 url = 'https://github.com/oracle/dbt-oracle'
 
-VERSION = '1.8.3'
+VERSION = '1.8.4'
 setup(
     author="Oracle",
-    python_requires='>=3.8',
+    python_requires='>=3.9',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
diff --git a/tox.ini b/tox.ini
index 8379c06..d2c832a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py3{8,9,10,11,12}
+envlist = py3{9,10,11,12}
 
 [testenv]
 passenv =
@@ -15,7 +15,7 @@ passenv =
 
 deps =
     -rrequirements.txt
-    dbt-tests-adapter~=1.7,<1.8
+    dbt-tests-adapter~=1.8,<1.9
     pytest
 
 commands = pytest