diff --git a/R/AggregateCovariates.R b/R/AggregateCovariates.R
index 8a3c220..6292b1d 100644
--- a/R/AggregateCovariates.R
+++ b/R/AggregateCovariates.R
@@ -260,7 +260,7 @@ computeTargetAggregateCovariateAnalyses <- function(
   message("Extracting target cohort counts")
   sql <- "select
   cohort_definition_id,
-  count(*) row_count,
+  count_big(*) row_count,
   count(distinct subject_id) person_count,
   min(datediff(day, cohort_start_date, cohort_end_date)) min_exposure_time,
   avg(datediff(day, cohort_start_date, cohort_end_date)) mean_exposure_time,
diff --git a/inst/settings/resultsDataModelSpecification.csv b/inst/settings/resultsDataModelSpecification.csv
index 3dc0e59..ecd5d9e 100644
--- a/inst/settings/resultsDataModelSpecification.csv
+++ b/inst/settings/resultsDataModelSpecification.csv
@@ -113,7 +113,7 @@ cohort_counts,start_anchor,varchar(15),No,No,No,No,The start anchor
 cohort_counts,end_anchor,varchar(15),No,No,No,No,The end anchor
 cohort_counts,min_prior_observation,int,No,No,No,No,Minimum time observed before index
 cohort_counts,outcome_washout_days,int,No,No,No,No,Patients with outcome during washout are excluded
-cohort_counts,row_count,int,Yes,No,No,No,The number of rows in each cohort
+cohort_counts,row_count,bigint,Yes,No,No,No,The number of rows in each cohort
 cohort_counts,person_count,int,Yes,No,No,No,The number of distinct people in each cohort
 cohort_counts,min_exposure_time,bigint,No,No,No,No,Minimum exposure time across cohort
 cohort_counts,mean_exposure_time,bigint,No,No,No,No,Mean exposure time across cohort
diff --git a/inst/sql/sql_server/ResultTables.sql b/inst/sql/sql_server/ResultTables.sql
index edb85e2..5012558 100644
--- a/inst/sql/sql_server/ResultTables.sql
+++ b/inst/sql/sql_server/ResultTables.sql
@@ -155,7 +155,7 @@ CREATE TABLE @my_schema.@table_prefixcohort_counts(
     end_anchor varchar(15),
     min_prior_observation int,
     outcome_washout_days int,
-    row_count int NOT NULL,
+    row_count bigint NOT NULL,
     person_count int NOT NULL,
     min_exposure_time int,
     mean_exposure_time int,