diff --git a/taiga/projects/custom_attributes/migrations/0011_json_to_jsonb.py b/taiga/projects/custom_attributes/migrations/0011_json_to_jsonb.py
index cfe4ff4c..bbe14196 100644
--- a/taiga/projects/custom_attributes/migrations/0011_json_to_jsonb.py
+++ b/taiga/projects/custom_attributes/migrations/0011_json_to_jsonb.py
@@ -17,7 +17,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="custom_attributes_epiccustomattributesvalues",
                 column_name="attributes_values",
@@ -29,7 +29,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="custom_attributes_userstorycustomattributesvalues",
                 column_name="attributes_values",
@@ -41,7 +41,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="custom_attributes_taskcustomattributesvalues",
                 column_name="attributes_values",
@@ -53,7 +53,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="custom_attributes_issuecustomattributesvalues",
                 column_name="attributes_values",
diff --git a/taiga/projects/history/migrations/0014_json_to_jsonb.py b/taiga/projects/history/migrations/0014_json_to_jsonb.py
index c0704233..940217d9 100644
--- a/taiga/projects/history/migrations/0014_json_to_jsonb.py
+++ b/taiga/projects/history/migrations/0014_json_to_jsonb.py
@@ -18,31 +18,31 @@ class Migration(migrations.Migration):
                 ALTER TABLE "history_historyentry"
                    ALTER COLUMN "delete_comment_user"
                            TYPE jsonb
-                          USING regexp_replace("delete_comment_user"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("delete_comment_user"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "comment_versions"
                            TYPE jsonb
-                          USING regexp_replace("comment_versions"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("comment_versions"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "values_diff_cache"
                            TYPE jsonb
-                          USING regexp_replace("values_diff_cache"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("values_diff_cache"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "user"
                            TYPE jsonb
-                          USING regexp_replace("user"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("user"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "diff"
                            TYPE jsonb
-                          USING regexp_replace("diff"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("diff"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "snapshot"
                            TYPE jsonb
-                          USING regexp_replace("snapshot"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("snapshot"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "values"
                            TYPE jsonb
-                          USING regexp_replace("values"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("values"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """,
             reverse_sql=migrations.RunSQL.noop
         ),
diff --git a/taiga/projects/migrations/0055_json_to_jsonb.py b/taiga/projects/migrations/0055_json_to_jsonb.py
index 4530bf7f..f84d35c0 100644
--- a/taiga/projects/migrations/0055_json_to_jsonb.py
+++ b/taiga/projects/migrations/0055_json_to_jsonb.py
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "projects_projectmodulesconfig"
                    ALTER COLUMN "config"
                            TYPE jsonb
-                          USING regexp_replace("config"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("config"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """,
             reverse_sql=migrations.RunSQL.noop
         ),
@@ -27,43 +27,43 @@ class Migration(migrations.Migration):
                 ALTER TABLE "projects_projecttemplate"
                    ALTER COLUMN "roles"
                            TYPE jsonb
-                          USING regexp_replace("roles"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("roles"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "default_options"
                            TYPE jsonb
-                          USING regexp_replace("default_options"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("default_options"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "epic_statuses"
                            TYPE jsonb
-                          USING regexp_replace("epic_statuses"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("epic_statuses"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "us_statuses"
                            TYPE jsonb
-                          USING regexp_replace("us_statuses"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("us_statuses"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "points"
                            TYPE jsonb
-                          USING regexp_replace("points"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("points"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "task_statuses"
                            TYPE jsonb
-                          USING regexp_replace("task_statuses"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("task_statuses"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "issue_statuses"
                            TYPE jsonb
-                          USING regexp_replace("issue_statuses"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("issue_statuses"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "issue_types"
                            TYPE jsonb
-                          USING regexp_replace("issue_types"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("issue_types"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "priorities"
                            TYPE jsonb
-                          USING regexp_replace("priorities"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("priorities"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "severities"
                            TYPE jsonb
-                          USING regexp_replace("severities"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("severities"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """,
             reverse_sql=migrations.RunSQL.noop
         ),
diff --git a/taiga/timeline/migrations/0006_json_to_jsonb.py b/taiga/timeline/migrations/0006_json_to_jsonb.py
index b6b17e54..de9b3830 100644
--- a/taiga/timeline/migrations/0006_json_to_jsonb.py
+++ b/taiga/timeline/migrations/0006_json_to_jsonb.py
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="timeline_timeline",
                 column_name="data",
diff --git a/taiga/users/migrations/0023_json_to_jsonb.py b/taiga/users/migrations/0023_json_to_jsonb.py
index f16d5699..feb42127 100644
--- a/taiga/users/migrations/0023_json_to_jsonb.py
+++ b/taiga/users/migrations/0023_json_to_jsonb.py
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="users_authdata",
                 column_name="extra",
diff --git a/taiga/userstorage/migrations/0003_json_to_jsonb.py b/taiga/userstorage/migrations/0003_json_to_jsonb.py
index 228324ac..e828d74c 100644
--- a/taiga/userstorage/migrations/0003_json_to_jsonb.py
+++ b/taiga/userstorage/migrations/0003_json_to_jsonb.py
@@ -18,7 +18,7 @@ class Migration(migrations.Migration):
                 ALTER TABLE "{table_name}"
                    ALTER COLUMN "{column_name}"
                            TYPE jsonb
-                          USING regexp_replace("{column_name}"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("{column_name}"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """.format(
                 table_name="userstorage_storageentry",
                 column_name="value",
diff --git a/taiga/webhooks/migrations/0006_json_to_jsonb.py b/taiga/webhooks/migrations/0006_json_to_jsonb.py
index ed6258e3..fb86ed7b 100644
--- a/taiga/webhooks/migrations/0006_json_to_jsonb.py
+++ b/taiga/webhooks/migrations/0006_json_to_jsonb.py
@@ -18,15 +18,15 @@ class Migration(migrations.Migration):
                 ALTER TABLE "webhooks_webhooklog"
                    ALTER COLUMN "request_headers"
                            TYPE jsonb
-                          USING regexp_replace("request_headers"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("request_headers"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "request_data"
                            TYPE jsonb
-                          USING regexp_replace("request_data"::text, '\\u0000', '\\\\u0000', 'g')::jsonb,
+                          USING regexp_replace("request_data"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb,
 
                    ALTER COLUMN "response_headers"
                            TYPE jsonb
-                          USING regexp_replace("response_headers"::text, '\\u0000', '\\\\u0000', 'g')::jsonb;
+                          USING regexp_replace("response_headers"::text, '[\\\\]+u0000', '\\\\\\\\u0000', 'g')::jsonb;
             """,
             reverse_sql=migrations.RunSQL.noop
         ),