diff --git a/php/admin/functions.php b/php/admin/functions.php
index 4e640b5fb..d2f47e68d 100644
--- a/php/admin/functions.php
+++ b/php/admin/functions.php
@@ -215,6 +215,38 @@ function qsm_add_author_column_in_db() {
 			}
 		}
 	}
+
+	/**
+	 * Add new column in the results table
+	 *
+	 * @since 9.0.1
+	 */
+	if ( get_option( 'qsm_update_db_column_charset_utf8mb4_unicode_ci', '' ) != 1 ) {
+		global $wpdb;
+
+		$tables_to_convert = array(
+			"{$wpdb->prefix}mlw_qm_audit_trail",
+			"{$wpdb->prefix}mlw_questions",
+			"{$wpdb->prefix}mlw_quizzes",
+			"{$wpdb->prefix}mlw_results",
+		);
+
+		$success = true;
+
+		foreach ( $tables_to_convert as $table ) {
+			$query = "ALTER TABLE $table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;";
+			$result = $wpdb->query($query);
+
+			if ( $result === false ) {
+				$success = false;
+				$mlwQuizMasterNext->log_manager->add( 'Error updating column charset utf8mb4_unicode_ci', "Tried $query but got {$wpdb->last_error}.", 0, 'error' );
+			}
+		}
+
+		if ( $success ) {
+			update_option( 'qsm_update_db_column_charset_utf8mb4_unicode_ci', 1 );
+		}
+	}
 }
 
 add_action( 'admin_init', 'qsm_change_the_post_type' );
diff --git a/php/classes/class-qsm-install.php b/php/classes/class-qsm-install.php
index 94866fa6c..447871480 100644
--- a/php/classes/class-qsm-install.php
+++ b/php/classes/class-qsm-install.php
@@ -1951,10 +1951,10 @@ public function update() {
 			}
 
 			// Update 2.6.1
-			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_qm_audit_trail CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;' );
-			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_questions CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci' );
-			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_quizzes CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci' );
-			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_results CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci' );
+			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_qm_audit_trail CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;' );
+			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_questions CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci' );
+			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_quizzes CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci' );
+			$results = $wpdb->query( 'ALTER TABLE ' . $wpdb->prefix . 'mlw_results CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci' );
 
 			global $wpdb;
 			$table_name  = $wpdb->prefix . 'mlw_results';