diff --git a/lib/PostgreSQL/store.js b/lib/PostgreSQL/store.js
index b2c565e..42bef83 100644
--- a/lib/PostgreSQL/store.js
+++ b/lib/PostgreSQL/store.js
@@ -127,12 +127,19 @@ class PostgreSQLStore extends CascadeStore_1.CascadeStore {
                     const { type } = attributes[attr];
                     switch (type) {
                         case 'date':
-                        case 'time': {
+                        case 'time':
+                        case 'datetime': {
                             if (value instanceof Date) {
                                 r[attr] = value.valueOf();
                             }
                             else {
-                                r[attr] = value;
+                                if (typeof value === 'string') {
+                                    r[attr] = parseInt(value, 10);
+                                }
+                                else {
+                                    (0, assert_1.default)(typeof value === 'number' || value === null);
+                                    r[attr] = value;
+                                }
                             }
                             break;
                         }
diff --git a/src/PostgreSQL/store.ts b/src/PostgreSQL/store.ts
index cf7f3ef..b14580d 100644
--- a/src/PostgreSQL/store.ts
+++ b/src/PostgreSQL/store.ts
@@ -200,11 +200,17 @@ export class PostgreSQLStore<
 
                     switch (type) {
                         case 'date':
-                        case 'time': {
+                        case 'time':
+                        case 'datetime': {
                             if (value instanceof Date) {
                                 r[attr] = value.valueOf();
                             } else {
-                                r[attr] = value;
+                                if (typeof value === 'string') {
+                                    r[attr] = parseInt(value, 10);
+                                } else {
+                                    assert(typeof value === 'number' || value === null);
+                                    r[attr] = value;
+                                }
                             }
                             break;
                         }