diff --git a/dbt_project.yml b/dbt_project.yml
index 963c066..4375b40 100644
--- a/dbt_project.yml
+++ b/dbt_project.yml
@@ -11,6 +11,8 @@ analysis-paths: ["analysis"]
 data-paths: ["data"]
 macro-paths: ["macros"]
 
+require-dbt-version: ">=0.16.0"
+
 models:
   snowplow:
     base:
diff --git a/integration_tests/dbt_project.yml b/integration_tests/dbt_project.yml
index 7e4bdf3..06790cb 100644
--- a/integration_tests/dbt_project.yml
+++ b/integration_tests/dbt_project.yml
@@ -31,3 +31,17 @@ models:
       'snowplow:context:useragent': FALSE
       'snowplow:pass_through_columns': ['test_add_col']
 
+seeds:
+  sp_event_update:
+    
+seeds:
+  snowplow_integration_tests:
+    snowplow:
+      sp_event_update:
+        column_types:
+          collector_tstamp: timestamp
+          derived_tstamp: timestamp
+      sp_event:
+        column_types:
+          collector_tstamp: timestamp
+          derived_tstamp: timestamp    
diff --git a/macros/adapters/bigquery/identification/snowplow_id_map.sql b/macros/adapters/bigquery/identification/snowplow_id_map.sql
index 0e79e21..b6c3b2f 100644
--- a/macros/adapters/bigquery/identification/snowplow_id_map.sql
+++ b/macros/adapters/bigquery/identification/snowplow_id_map.sql
@@ -8,18 +8,25 @@
 {{
     config(
         materialized='incremental',
-        partition_by='DATE(max_tstamp)',
+        partition_by={
+            'field': 'max_tstamp',
+            'data_type': 'timestamp'
+        },
         unique_key="domain_userid"
     )
 }}
 
-{% set start_date = get_most_recent_record(this, "max_tstamp", "2001-01-01") %}
-
 with all_events as (
 
     select *
     from {{ ref('snowplow_base_events') }}
-    where DATE(collector_tstamp) >= date_sub('{{ start_date }}', interval 1 day)
+    
+    {% if is_incremental() %}
+    where DATE(collector_tstamp) >= date_sub(
+        DATE(_dbt_max_partition),
+        interval {{var('snowplow:page_view_lookback_days')}} day
+    )
+    {% endif %}
 
 ),
 
@@ -29,7 +36,6 @@ new_sessions as (
         domain_sessionid
 
     from all_events
-    where DATE(collector_tstamp) >= '{{ start_date }}'
 
 ),
 
@@ -61,7 +67,7 @@ prep as (
             rows between unbounded preceding and unbounded following
         ) as user_id,
 
-        max(timestamp(collector_tstamp)) over (
+        max(collector_tstamp) over (
             partition by domain_userid
         ) as max_tstamp
 
diff --git a/macros/adapters/bigquery/pageviews/snowplow_page_views.sql b/macros/adapters/bigquery/pageviews/snowplow_page_views.sql
index e74cc74..ef1ef55 100644
--- a/macros/adapters/bigquery/pageviews/snowplow_page_views.sql
+++ b/macros/adapters/bigquery/pageviews/snowplow_page_views.sql
@@ -4,13 +4,15 @@
 {{
     config(
         materialized='incremental',
-        partition_by='DATE(page_view_start)',
+        partition_by={
+            'field': 'page_view_start',
+            'data_type': 'timestamp'
+        },
         unique_key="page_view_id"
     )
 }}
 
 {% set timezone = var('snowplow:timezone', 'UTC') %}
-{% set start_date = get_most_recent_record(this, "page_view_start", "2001-01-01") %}
 
 /*
     General approach: find sessions that happened since the last time
@@ -27,9 +29,12 @@ with all_events as (
     select *
     from {{ ref('snowplow_base_events') }}
 
-    -- load up events from the start date, and the day before it, to ensure
-    -- that we capture pageviews that span midnight
-    where DATE(collector_tstamp) >= date_sub('{{ start_date }}', interval 1 day)
+    {% if is_incremental() %}
+    where DATE(collector_tstamp) >= date_sub(
+        DATE(_dbt_max_partition),
+        interval {{var('snowplow:page_view_lookback_days')}} day
+    )
+    {% endif %}
 
 ),
 
@@ -40,9 +45,6 @@ new_sessions as (
 
     from all_events
 
-    -- only consider events for sessions that occurred on or after the start_date
-    where DATE(collector_tstamp) >= '{{ start_date }}'
-
 ),
 
 relevant_events as (
diff --git a/macros/adapters/bigquery/sessions/snowplow_sessions.sql b/macros/adapters/bigquery/sessions/snowplow_sessions.sql
index 27c719b..74944fb 100644
--- a/macros/adapters/bigquery/sessions/snowplow_sessions.sql
+++ b/macros/adapters/bigquery/sessions/snowplow_sessions.sql
@@ -4,7 +4,10 @@
 {{
     config(
         materialized='table',
-        partition_by='DATE(session_start)'
+        partition_by={
+            'field': 'session_start',
+            'data_type': 'timestamp'
+        }
     )
 }}
 
diff --git a/macros/adapters/bigquery/sessions/snowplow_sessions_tmp.sql b/macros/adapters/bigquery/sessions/snowplow_sessions_tmp.sql
index 0935540..b9365d2 100644
--- a/macros/adapters/bigquery/sessions/snowplow_sessions_tmp.sql
+++ b/macros/adapters/bigquery/sessions/snowplow_sessions_tmp.sql
@@ -4,17 +4,24 @@
 {{
     config(
         materialized='incremental',
-        partition_by='DATE(session_start)',
+        partition_by={
+            'field': 'session_start',
+            'data_type': 'timestamp'
+        },
         unique_key="session_id"
     )
 }}
 
-{% set start_date = get_most_recent_record(this, "session_start", "2001-01-01") %}
-
 with all_page_views as (
 
     select * from {{ ref('snowplow_page_views') }}
-    where DATE(page_view_start) >= date_sub('{{ start_date }}', interval 1 day)
+    
+    {% if is_incremental() %}
+    where DATE(page_view_start) >= date_sub(
+        DATE(_dbt_max_partition),
+        interval {{var('snowplow:page_view_lookback_days')}} day
+    )
+    {% endif %}
 
 ),
 
@@ -24,7 +31,6 @@ new_page_views as (
         session_id
 
     from all_page_views
-    where DATE(page_view_start) >= '{{ start_date }}'
 
 ),