diff --git a/src/utils/importSQL/mariadb.js b/src/utils/importSQL/mariadb.js
index 563200ef..0bcf4a12 100644
--- a/src/utils/importSQL/mariadb.js
+++ b/src/utils/importSQL/mariadb.js
@@ -105,7 +105,7 @@ export function fromMariaDB(ast, diagramDb = DB.GENERIC) {
                   }
                 });
               });
-            } else if (d.constraint_type === "FOREIGN KEY") {
+            } else if (d.constraint_type.toLowerCase() === "foreign key") {
               const relationship = {};
               const startTableId = table.id;
               const startTable = e.table[0].table;
@@ -187,7 +187,7 @@ export function fromMariaDB(ast, diagramDb = DB.GENERIC) {
       e.expr.forEach((expr) => {
         if (
           expr.action === "add" &&
-          expr.create_definitions.constraint_type === "FOREIGN KEY"
+          expr.create_definitions.constraint_type.toLowerCase() === "foreign key"
         ) {
           const relationship = {};
           const startTable = e.table[0].table;
diff --git a/src/utils/importSQL/mssql.js b/src/utils/importSQL/mssql.js
index 740f7441..71d6510d 100644
--- a/src/utils/importSQL/mssql.js
+++ b/src/utils/importSQL/mssql.js
@@ -117,7 +117,7 @@ export function fromMSSQL(ast, diagramDb = DB.GENERIC) {
                   }
                 });
               });
-            } else if (d.constraint_type === "FOREIGN KEY") {
+            } else if (d.constraint_type.toLowerCase() === "foreign key") {
               const relationship = {};
               const startTableId = table.id;
               const startTable = e.table[0].table;
@@ -199,7 +199,7 @@ export function fromMSSQL(ast, diagramDb = DB.GENERIC) {
       e.expr.forEach((expr) => {
         if (
           expr.action === "add" &&
-          expr.create_definitions.constraint_type === "FOREIGN KEY"
+          expr.create_definitions.constraint_type.toLowerCase() === "foreign key"
         ) {
           const relationship = {};
           const startTable = e.table[0].table;
diff --git a/src/utils/importSQL/mysql.js b/src/utils/importSQL/mysql.js
index f8b37151..075b3789 100644
--- a/src/utils/importSQL/mysql.js
+++ b/src/utils/importSQL/mysql.js
@@ -105,7 +105,7 @@ export function fromMySQL(ast, diagramDb = DB.GENERIC) {
                   }
                 });
               });
-            } else if (d.constraint_type === "FOREIGN KEY") {
+            } else if (d.constraint_type.toLowerCase() === "foreign key") {
               const relationship = {};
               const startTableId = table.id;
               const startTable = e.table[0].table;
@@ -187,7 +187,7 @@ export function fromMySQL(ast, diagramDb = DB.GENERIC) {
       e.expr.forEach((expr) => {
         if (
           expr.action === "add" &&
-          expr.create_definitions.constraint_type === "FOREIGN KEY"
+          expr.create_definitions.constraint_type.toLowerCase() === "foreign key"
         ) {
           const relationship = {};
           const startTable = e.table[0].table;
diff --git a/src/utils/importSQL/postgres.js b/src/utils/importSQL/postgres.js
index 2912404c..1cdb1266 100644
--- a/src/utils/importSQL/postgres.js
+++ b/src/utils/importSQL/postgres.js
@@ -105,7 +105,7 @@ export function fromPostgres(ast, diagramDb = DB.GENERIC) {
                   }
                 });
               });
-            } else if (d.constraint_type === "FOREIGN KEY") {
+            } else if (d.constraint_type.toLowerCase() === "foreign key") {
               const relationship = {};
               const startTableId = table.id;
               const startTable = e.table[0].table;
@@ -278,7 +278,7 @@ export function fromPostgres(ast, diagramDb = DB.GENERIC) {
       e.expr.forEach((expr) => {
         if (
           expr.action === "add" &&
-          expr.create_definitions.constraint_type === "FOREIGN KEY"
+          expr.create_definitions.constraint_type.toLowerCase() === "foreign key"
         ) {
           const relationship = {};
           const startTable = e.table[0].table;
diff --git a/src/utils/importSQL/sqlite.js b/src/utils/importSQL/sqlite.js
index 5bd3a1bd..9c89a4a1 100644
--- a/src/utils/importSQL/sqlite.js
+++ b/src/utils/importSQL/sqlite.js
@@ -122,7 +122,7 @@ export function fromSQLite(ast, diagramDb = DB.GENERIC) {
                   }
                 });
               });
-            } else if (d.constraint_type === "FOREIGN KEY") {
+            } else if (d.constraint_type.toLowerCase() === "foreign key") {
               const relationship = {};
               const startTableId = table.id;
               const startTable = e.table[0].table;