diff --git a/rslib/src/deckconfig/mod.rs b/rslib/src/deckconfig/mod.rs
index e8fb0c0c0..2737792bd 100644
--- a/rslib/src/deckconfig/mod.rs
+++ b/rslib/src/deckconfig/mod.rs
@@ -296,7 +296,7 @@ pub(crate) fn ensure_deck_config_values_valid(config: &mut DeckConfigInner) {
     ensure_f32_valid(
         &mut config.desired_retention,
         default.desired_retention,
-        0.7,
+        0.1,
         0.99,
     );
     ensure_f32_valid(
diff --git a/rslib/src/deckconfig/service.rs b/rslib/src/deckconfig/service.rs
index b8987982b..c7cb753f0 100644
--- a/rslib/src/deckconfig/service.rs
+++ b/rslib/src/deckconfig/service.rs
@@ -127,7 +127,7 @@ impl crate::services::DeckConfigService for Collection {
 
         config.deck_size = guard.cards;
 
-        let costs = (70u32..=99u32)
+        let costs = (10u32..=99u32)
             .into_par_iter()
             .map(|dr| {
                 Ok((
diff --git a/rslib/src/scheduler/fsrs/retention.rs b/rslib/src/scheduler/fsrs/retention.rs
index 4c21623bb..2a825f8e6 100644
--- a/rslib/src/scheduler/fsrs/retention.rs
+++ b/rslib/src/scheduler/fsrs/retention.rs
@@ -36,7 +36,7 @@ impl Collection {
                 Some(cards),
                 None,
             )?
-            .clamp(0.7, 0.95))
+            .clamp(0.1, 0.99))
     }
 
     pub fn get_optimal_retention_parameters(
diff --git a/ts/routes/deck-options/FsrsOptions.svelte b/ts/routes/deck-options/FsrsOptions.svelte
index 48124771f..86e8f306a 100644
--- a/ts/routes/deck-options/FsrsOptions.svelte
+++ b/ts/routes/deck-options/FsrsOptions.svelte
@@ -356,7 +356,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         <SpinBoxFloatRow
             bind:value={effectiveDesiredRetention}
             defaultValue={defaults.desiredRetention}
-            min={0.7}
+            min={0.1}
             max={0.99}
             percentage={true}
             bind:focused={desiredRetentionFocused}