diff --git a/Cargo.lock b/Cargo.lock
index f7326e1..be12484 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -475,7 +475,7 @@ dependencies = [
 
 [[package]]
 name = "bitkitcore"
-version = "0.1.55"
+version = "0.1.56"
 dependencies = [
  "android_logger",
  "async-trait",
diff --git a/Cargo.toml b/Cargo.toml
index 7394d8a..7507210 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bitkitcore"
-version = "0.1.55"
+version = "0.1.56"
 edition = "2021"
 
 [lib]
diff --git a/Package.swift b/Package.swift
index f7a62a2..e3e0808 100644
--- a/Package.swift
+++ b/Package.swift
@@ -3,8 +3,8 @@
 
 import PackageDescription
 
-let tag = "v0.1.55"
-let checksum = "273da44b44f6f47ee60471af771594f4103bdd4405b6b2f68ff5359d5a0eaf5a"
+let tag = "v0.1.56"
+let checksum = "6b3b2e2138f80bde3a3cbbf21f11bb194fef7299a8eebff5175c10632fc80eff"
 let url = "https://github.com/synonymdev/bitkit-core/releases/download/\(tag)/BitkitCore.xcframework.zip"
 
 let package = Package(
diff --git a/bindings/android/gradle.properties b/bindings/android/gradle.properties
index b250e08..37cce97 100644
--- a/bindings/android/gradle.properties
+++ b/bindings/android/gradle.properties
@@ -3,4 +3,4 @@ android.useAndroidX=true
 android.enableJetifier=true
 kotlin.code.style=official
 group=com.synonym
-version=0.1.55
+version=0.1.56
diff --git a/bindings/android/lib/src/main/jniLibs/arm64-v8a/libbitkitcore.so b/bindings/android/lib/src/main/jniLibs/arm64-v8a/libbitkitcore.so
index 82b917e..77a6803 100755
Binary files a/bindings/android/lib/src/main/jniLibs/arm64-v8a/libbitkitcore.so and b/bindings/android/lib/src/main/jniLibs/arm64-v8a/libbitkitcore.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/arm64-v8a/libpubky_app_specs-90a3a8b6be1a7a22.so b/bindings/android/lib/src/main/jniLibs/arm64-v8a/libpubky_app_specs-90a3a8b6be1a7a22.so
new file mode 100755
index 0000000..2856ba2
Binary files /dev/null and b/bindings/android/lib/src/main/jniLibs/arm64-v8a/libpubky_app_specs-90a3a8b6be1a7a22.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libbitkitcore.so b/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libbitkitcore.so
index ca524d9..c2c10b6 100755
Binary files a/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libbitkitcore.so and b/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libbitkitcore.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libpubky_app_specs-a5b33175be180155.so b/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libpubky_app_specs-a5b33175be180155.so
new file mode 100755
index 0000000..9df27c8
Binary files /dev/null and b/bindings/android/lib/src/main/jniLibs/armeabi-v7a/libpubky_app_specs-a5b33175be180155.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/x86/libbitkitcore.so b/bindings/android/lib/src/main/jniLibs/x86/libbitkitcore.so
index 4e84767..693ebe3 100755
Binary files a/bindings/android/lib/src/main/jniLibs/x86/libbitkitcore.so and b/bindings/android/lib/src/main/jniLibs/x86/libbitkitcore.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/x86/libpubky_app_specs-6691cf4f97b9d92f.so b/bindings/android/lib/src/main/jniLibs/x86/libpubky_app_specs-6691cf4f97b9d92f.so
new file mode 100755
index 0000000..d08e98c
Binary files /dev/null and b/bindings/android/lib/src/main/jniLibs/x86/libpubky_app_specs-6691cf4f97b9d92f.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/x86_64/libbitkitcore.so b/bindings/android/lib/src/main/jniLibs/x86_64/libbitkitcore.so
index caa9196..9c9bd9f 100755
Binary files a/bindings/android/lib/src/main/jniLibs/x86_64/libbitkitcore.so and b/bindings/android/lib/src/main/jniLibs/x86_64/libbitkitcore.so differ
diff --git a/bindings/android/lib/src/main/jniLibs/x86_64/libpubky_app_specs-4ad86c877f377f40.so b/bindings/android/lib/src/main/jniLibs/x86_64/libpubky_app_specs-4ad86c877f377f40.so
new file mode 100755
index 0000000..8f8f793
Binary files /dev/null and b/bindings/android/lib/src/main/jniLibs/x86_64/libpubky_app_specs-4ad86c877f377f40.so differ
diff --git a/bindings/ios/BitkitCore.xcframework.zip b/bindings/ios/BitkitCore.xcframework.zip
index 5cb60c1..5377165 100644
Binary files a/bindings/ios/BitkitCore.xcframework.zip and b/bindings/ios/BitkitCore.xcframework.zip differ
diff --git a/bindings/ios/BitkitCore.xcframework/ios-arm64-simulator/libbitkitcore.a b/bindings/ios/BitkitCore.xcframework/ios-arm64-simulator/libbitkitcore.a
index e1f3684..31b558a 100644
Binary files a/bindings/ios/BitkitCore.xcframework/ios-arm64-simulator/libbitkitcore.a and b/bindings/ios/BitkitCore.xcframework/ios-arm64-simulator/libbitkitcore.a differ
diff --git a/bindings/ios/BitkitCore.xcframework/ios-arm64/libbitkitcore.a b/bindings/ios/BitkitCore.xcframework/ios-arm64/libbitkitcore.a
index 9a78996..f9b2cae 100644
Binary files a/bindings/ios/BitkitCore.xcframework/ios-arm64/libbitkitcore.a and b/bindings/ios/BitkitCore.xcframework/ios-arm64/libbitkitcore.a differ
diff --git a/bindings/python/bitkitcore/libbitkitcore.dylib b/bindings/python/bitkitcore/libbitkitcore.dylib
index da11ccc..ad6108a 100755
Binary files a/bindings/python/bitkitcore/libbitkitcore.dylib and b/bindings/python/bitkitcore/libbitkitcore.dylib differ
diff --git a/src/modules/scanner/implementation.rs b/src/modules/scanner/implementation.rs
index 6d7e091..72e47a1 100644
--- a/src/modules/scanner/implementation.rs
+++ b/src/modules/scanner/implementation.rs
@@ -266,7 +266,8 @@ impl Scanner {
             Bolt11Invoice::from_str(invoice_str).map_err(|_| DecodingError::InvalidFormat)?;
 
         let network = NetworkType::from(bolt11_invoice.network());
-        let amount_satoshis: u64 = bolt11_invoice.amount_milli_satoshis().unwrap_or(0) / 1000u64;
+        let amount_msat: u64 = bolt11_invoice.amount_milli_satoshis().unwrap_or(0);
+        let amount_satoshis: u64 = amount_msat.div_ceil(1000);
         let is_expired = bolt11_invoice.is_expired();
 
         let timestamp = DateTime::<Utc>::from_timestamp(
diff --git a/src/modules/scanner/tests.rs b/src/modules/scanner/tests.rs
index f9576b1..ea18f1f 100644
--- a/src/modules/scanner/tests.rs
+++ b/src/modules/scanner/tests.rs
@@ -2,6 +2,31 @@
 mod tests {
     use crate::{DecodingError, Scanner};
 
+    /// Helper to create a signed BOLT11 invoice string with a specific msat amount.
+    fn create_test_invoice_with_msat(amount_msat: u64) -> String {
+        use bitcoin::hashes::Hash;
+        use bitcoin::secp256k1::{Secp256k1, SecretKey};
+        use lightning_invoice::{Currency, InvoiceBuilder};
+
+        let secp = Secp256k1::new();
+        let secret_key = SecretKey::from_slice(&[0xab; 32]).unwrap();
+
+        let payment_hash = [0u8; 32];
+        let payment_secret = [0u8; 32];
+
+        let invoice = InvoiceBuilder::new(Currency::Bitcoin)
+            .amount_milli_satoshis(amount_msat)
+            .description("test invoice".to_string())
+            .payment_hash(bitcoin::hashes::sha256::Hash::from_byte_array(payment_hash))
+            .payment_secret(lightning_invoice::PaymentSecret(payment_secret))
+            .current_timestamp()
+            .min_final_cltv_expiry_delta(144)
+            .build_signed(|hash| secp.sign_ecdsa_recoverable(hash, &secret_key))
+            .unwrap();
+
+        invoice.to_string()
+    }
+
     #[tokio::test]
     async fn test_lightning_invoice_decode() {
         let invoice = "lightning:lnbc543210n1pnjdrvfpp5s720f4z6wzvjwpdnrlpffgct375l46yu9c6cpe7gdvvdfay47cnsdqqcqzzsxqrrsssp53uty4kfw8k3wmw4ga802udavz7e64tc7dmaz2cmtkj9srfxaq3ps9p4gqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqpqysgqwl2tdhzm9e6mtedt7a4263yw7dqxehdwjnjk23r4g8tuppk6rs994f6scunwsev3w207tjldwkpdt32rcegzphgk05c0lctv8he7smgqyfn5xq".to_string();
@@ -231,4 +256,51 @@ mod tests {
             _ => assert!(false, "Should be an OnChain invoice"),
         }
     }
+
+    /// Helper to decode a test invoice and return amount_satoshis.
+    async fn decode_invoice_sats(amount_msat: u64) -> u64 {
+        let bolt11 = create_test_invoice_with_msat(amount_msat);
+        match Scanner::decode(bolt11).await.unwrap() {
+            Scanner::Lightning { invoice } => invoice.amount_satoshis,
+            _ => panic!("Should be a Lightning invoice"),
+        }
+    }
+
+    #[tokio::test]
+    async fn test_lightning_invoice_sub_satoshi_amount_rounds_up() {
+        // 18557538 msat = 18557.538 sats, must round up to avoid underpayment
+        assert_eq!(decode_invoice_sats(18557538).await, 18558);
+    }
+
+    #[tokio::test]
+    async fn test_lightning_invoice_sub_satoshi_remainders() {
+        // Remainder > 500: 222538 msat = 222.538 sats
+        assert_eq!(decode_invoice_sats(222538).await, 223);
+
+        // Remainder < 500: 222222 msat = 222.222 sats
+        assert_eq!(decode_invoice_sats(222222).await, 223);
+
+        // Remainder = 500: 500500 msat = 500.500 sats
+        assert_eq!(decode_invoice_sats(500500).await, 501);
+    }
+
+    #[tokio::test]
+    async fn test_lightning_invoice_exact_sat_amount() {
+        assert_eq!(decode_invoice_sats(3500000).await, 3500);
+    }
+
+    #[tokio::test]
+    async fn test_lightning_invoice_msat_boundary_amounts() {
+        // 1 msat (smallest non-zero)
+        assert_eq!(decode_invoice_sats(1).await, 1);
+
+        // 999 msat (just under 1 sat)
+        assert_eq!(decode_invoice_sats(999).await, 1);
+
+        // 1000 msat (exactly 1 sat)
+        assert_eq!(decode_invoice_sats(1000).await, 1);
+
+        // 1001 msat (just over 1 sat)
+        assert_eq!(decode_invoice_sats(1001).await, 2);
+    }
 }