diff --git a/server/migrations/032_issue_search_index.up.sql b/server/migrations/032_issue_search_index.up.sql
index bda9d2cfe5..9124e40b6c 100644
--- a/server/migrations/032_issue_search_index.up.sql
+++ b/server/migrations/032_issue_search_index.up.sql
@@ -1,8 +1,20 @@
 -- Enable pg_bigm extension for bigram-based full-text search (CJK-friendly).
-CREATE EXTENSION IF NOT EXISTS pg_bigm;
+-- Skips gracefully if pg_bigm is not available (e.g. CI environments).
+DO $$
+BEGIN
+  CREATE EXTENSION IF NOT EXISTS pg_bigm;
+EXCEPTION WHEN OTHERS THEN
+  RAISE NOTICE 'pg_bigm not available, skipping bigram indexes';
+END
+$$;
 
--- GIN index on issue title for LIKE '%keyword%' queries.
-CREATE INDEX idx_issue_title_bigm ON issue USING gin (title gin_bigm_ops);
-
--- GIN index on issue description (nullable, use COALESCE).
-CREATE INDEX idx_issue_description_bigm ON issue USING gin (COALESCE(description, '') gin_bigm_ops);
+-- GIN indexes on issue title/description for LIKE '%keyword%' queries.
+-- Only created when pg_bigm is installed.
+DO $$
+BEGIN
+  CREATE INDEX idx_issue_title_bigm ON issue USING gin (title gin_bigm_ops);
+  CREATE INDEX idx_issue_description_bigm ON issue USING gin (COALESCE(description, '') gin_bigm_ops);
+EXCEPTION WHEN OTHERS THEN
+  RAISE NOTICE 'skipping bigram indexes (pg_bigm not installed)';
+END
+$$;
diff --git a/server/migrations/033_comment_search_index.up.sql b/server/migrations/033_comment_search_index.up.sql
index b552fde38f..0ce84b589b 100644
--- a/server/migrations/033_comment_search_index.up.sql
+++ b/server/migrations/033_comment_search_index.up.sql
@@ -1,2 +1,9 @@
 -- GIN index on comment content for LIKE '%keyword%' queries (pg_bigm).
-CREATE INDEX idx_comment_content_bigm ON comment USING gin (content gin_bigm_ops);
+-- Only created when pg_bigm is installed.
+DO $$
+BEGIN
+  CREATE INDEX idx_comment_content_bigm ON comment USING gin (content gin_bigm_ops);
+EXCEPTION WHEN OTHERS THEN
+  RAISE NOTICE 'skipping bigram index on comment (pg_bigm not installed)';
+END
+$$;