diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 738fddb..6d5e2e2 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -769,6 +769,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "sha2 0.10.7",
+ "sled",
  "smallvec",
  "smartstring",
  "sqlite",
@@ -1188,6 +1189,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fs2"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9564fc758e15025b46aa6643b1b77d047d1a56a1aea6e01002ac0c7026876213"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "futures"
 version = "0.3.28"
@@ -2885,6 +2896,22 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "sled"
+version = "0.34.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f96b4737c2ce5987354855aed3797279def4ebf734436c6aa4552cf8e169935"
+dependencies = [
+ "crc32fast",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "fs2",
+ "fxhash",
+ "libc",
+ "log",
+ "parking_lot 0.11.2",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.11.0"
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index be69813..cb3ab7b 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -45,7 +45,7 @@ anyhow = "1.0.71"
 serde_json = "1.0.94"
 axum-macros = "0.3.8"
 axum = { version = "0.6.20", features = ["headers", "ws"] }
-cozo = { version = "0.7.6", default-features = false, features = ["minimal", "rayon"] }
+cozo = { version = "0.7.6", default-features = false, features = ["minimal", "rayon", "storage-sled"] }
 itertools = "0.11.0"
 miette = "5.10.0"
 map-macro = "0.2.6"
diff --git a/backend/conf/prod.yaml b/backend/conf/prod.yaml
index d13544e..e410005 100644
--- a/backend/conf/prod.yaml
+++ b/backend/conf/prod.yaml
@@ -6,4 +6,4 @@
 host: 0.0.0.0
 
 db:
-  storage_engine: SQLite
\ No newline at end of file
+  storage_engine: Sled
\ No newline at end of file
diff --git a/backend/src/conf.rs b/backend/src/conf.rs
index adc8a6b..344b17d 100644
--- a/backend/src/conf.rs
+++ b/backend/src/conf.rs
@@ -43,6 +43,7 @@ pub struct EnvConf {
 pub enum DbStorageEngine {
     Memory,
     SQLite,
+    Sled,
 }
 
 #[derive(Deserialize, Clone, Debug)]
@@ -57,6 +58,7 @@ impl DbConf {
             match self.storage_engine {
                 DbStorageEngine::Memory => "mem",
                 DbStorageEngine::SQLite => "sqlite",
+                DbStorageEngine::Sled => "sled",
             },
             &self.path,
             Default::default(),
diff --git a/docs/install/backend-run.txt b/docs/install/backend-run.txt
index e651e5a..2057f25 100644
--- a/docs/install/backend-run.txt
+++ b/docs/install/backend-run.txt
@@ -1,21 +1,10 @@
 # local
 cargo run
 
-
 # prod test
-BE__ENV=prod BE__DB__STORAGE_ENGINE=Memory BE__DB__PATH="" cargo run --release
-
-# prod (detach process and redirect logs)
-BE__ENV=prod \
-BE__DB__STORAGE_ENGINE=Memory \
-BE__DB__PATH="/root/db" \
-nohup cargo run --release > /root/log.txt 2>&1 &
-
-
-# prod test with persistent storage (inconsistent/broken)
 BE__ENV=prod BE__DB__PATH="/root/db" cargo run --release
 
-# prod with persistent storage (detach process and redirect logs) (inconsistent/broken)
+# prod with (detach process and redirect logs)
 BE__ENV=prod \
 BE__DB__PATH="/root/db" \
 nohup cargo run --release > /root/log.txt 2>&1 &
diff --git a/docs/remember.txt b/docs/remember.txt
index 00d0ef3..009a3fd 100644
--- a/docs/remember.txt
+++ b/docs/remember.txt
@@ -9,9 +9,4 @@
 TODO
 - figure out session "Put session" multiple times per request in logs
 
-- prevent 500 responses due to "database is locked" when SQLite is used
-    - revert to persistent storage usage for prod
-// or/and
-- don't just give up - retry 500 from frontend side
-
 - protect endpoint_hits
\ No newline at end of file