diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31d5d772..b278cdd7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If
 
 ## Fixed
 - OIDC: Add default domain name to groups that are not email addresses.
+- RocksDB: Enable blob garbage collection to reclaim disk space from deleted blobs.
 
 ## [0.16.9] - 2026-06-15
 
diff --git a/crates/store/src/backend/rocksdb/main.rs b/crates/store/src/backend/rocksdb/main.rs
index 87ed522e..539a125f 100644
--- a/crates/store/src/backend/rocksdb/main.rs
+++ b/crates/store/src/backend/rocksdb/main.rs
@@ -39,6 +39,9 @@ impl RocksDbStore {
         let mut cf_opts = Options::default();
         cf_opts.set_enable_blob_files(true);
         cf_opts.set_min_blob_size(config.blob_size);
+        cf_opts.set_enable_blob_gc(true);
+        cf_opts.set_blob_gc_age_cutoff(1.0);
+        cf_opts.set_blob_gc_force_threshold(0.5);
         cfs.push(ColumnFamilyDescriptor::new(CF_BLOBS, cf_opts));
 
         // Other cfs
@@ -56,7 +59,6 @@ impl RocksDbStore {
             SUBSPACE_REPORT_OUT,
             SUBSPACE_REPORT_IN,
             SUBSPACE_LOGS,
-            SUBSPACE_BLOBS,
             SUBSPACE_TELEMETRY_SPAN,
             SUBSPACE_TELEMETRY_METRIC,
             SUBSPACE_SEARCH_INDEX,