diff --git a/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4 b/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4
index a8eba032f..51fd196e9 100644
--- a/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4
+++ b/debezium-ddl-parser/src/main/antlr4/io/debezium/ddl/parser/mysql/generated/MySqlParser.g4
@@ -622,6 +622,7 @@ alterSpecification
     | MODIFY COLUMN? ifExists?
       uid columnDefinition (FIRST | AFTER uid)?                     #alterByModifyColumn // ifExists is MariaDB-specific
     | DROP COLUMN? ifExists? uid RESTRICT?                          #alterByDropColumn // ifExists is MariaDB-specific
+    | DROP (CONSTRAINT | CHECK) uid                                 #alterByDropConstraintCheck
     | DROP PRIMARY KEY                                              #alterByDropPrimaryKey
     | DROP indexFormat=(INDEX | KEY) ifExists? uid                  #alterByDropIndex
     | RENAME indexFormat=(INDEX | KEY) uid TO uid                   #alterByRenameIndex
diff --git a/debezium-ddl-parser/src/test/resources/mysql/examples/ddl_alter.sql b/debezium-ddl-parser/src/test/resources/mysql/examples/ddl_alter.sql
index 3577c999e..a4141879e 100644
--- a/debezium-ddl-parser/src/test/resources/mysql/examples/ddl_alter.sql
+++ b/debezium-ddl-parser/src/test/resources/mysql/examples/ddl_alter.sql
@@ -4,6 +4,7 @@ alter table ship_class add column ship_spec varchar(150) first, add somecol int
 alter table t3 add column (c2 decimal(10, 2) comment 'comment`' null, c3 enum('abc', 'cba', 'aaa')), add index t3_i1 using btree (c2) comment 'some index';
 alter table t3 add column (c4 decimal(10, 2) comment 'comment`' null), add index t3_i2 using btree (c4) comment 'some index';
 alter table t2 add constraint t2_pk_constraint primary key (1c), alter column `_` set default 1;
+alter table t2 drop constraint t2_pk_constraint;
 alter table ship_class change column somecol col_for_del tinyint first;
 alter table ship_class drop col_for_del;
 alter table t3 drop index t3_i1;
@@ -100,4 +101,4 @@ alter user 'user'@'%' identified with 'mysql_native_password' as '*2470C0C06DEE4
     require none password expire default account unlock password_lock_time 2;
 alter user 'user'@'%' identified with 'mysql_native_password' as '*2470C0C06DEE42FD1618BB99005ADCA2EC9D1E19'
     require none password expire default account unlock password_lock_time unbounded;
-#end
\ No newline at end of file
+#end