diff --git a/packages/std/src/binary.rs b/packages/std/src/binary.rs
index 441a6770c..4fd3e0147 100644
--- a/packages/std/src/binary.rs
+++ b/packages/std/src/binary.rs
@@ -232,7 +232,7 @@ impl<'de> Deserialize<'de> for Binary {
 
 struct Base64Visitor;
 
-impl<'de> de::Visitor<'de> for Base64Visitor {
+impl de::Visitor<'_> for Base64Visitor {
     type Value = Binary;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
@@ -252,7 +252,7 @@ impl<'de> de::Visitor<'de> for Base64Visitor {
 
 struct BytesVisitor;
 
-impl<'de> de::Visitor<'de> for BytesVisitor {
+impl de::Visitor<'_> for BytesVisitor {
     type Value = Binary;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/checksum.rs b/packages/std/src/checksum.rs
index 5a5c26a00..400cc3a3a 100644
--- a/packages/std/src/checksum.rs
+++ b/packages/std/src/checksum.rs
@@ -95,7 +95,7 @@ impl<'de> Deserialize<'de> for Checksum {
 
 struct ChecksumVisitor;
 
-impl<'de> de::Visitor<'de> for ChecksumVisitor {
+impl de::Visitor<'_> for ChecksumVisitor {
     type Value = Checksum;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
@@ -115,7 +115,7 @@ impl<'de> de::Visitor<'de> for ChecksumVisitor {
 
 struct ChecksumBytesVisitor;
 
-impl<'de> de::Visitor<'de> for ChecksumBytesVisitor {
+impl de::Visitor<'_> for ChecksumBytesVisitor {
     type Value = Checksum;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/coins.rs b/packages/std/src/coins.rs
index dc916dc5c..530bdbcfd 100644
--- a/packages/std/src/coins.rs
+++ b/packages/std/src/coins.rs
@@ -297,13 +297,13 @@ impl<'a> Iterator for CoinsIter<'a> {
     }
 }
 
-impl<'a> DoubleEndedIterator for CoinsIter<'a> {
+impl DoubleEndedIterator for CoinsIter<'_> {
     fn next_back(&mut self) -> Option<Self::Item> {
         self.0.next_back().map(|(_, coin)| coin)
     }
 }
 
-impl<'a> ExactSizeIterator for CoinsIter<'a> {
+impl ExactSizeIterator for CoinsIter<'_> {
     fn len(&self) -> usize {
         self.0.len()
     }
diff --git a/packages/std/src/deps.rs b/packages/std/src/deps.rs
index cc7a4681a..d36578a26 100644
--- a/packages/std/src/deps.rs
+++ b/packages/std/src/deps.rs
@@ -33,7 +33,7 @@ pub struct Deps<'a, C: CustomQuery = Empty> {
 // See "There is a small difference between the two: the derive strategy will also
 // place a Copy bound on type parameters, which isn’t always desired."
 // https://doc.rust-lang.org/std/marker/trait.Copy.html
-impl<'a, C: CustomQuery> Copy for Deps<'a, C> {}
+impl<C: CustomQuery> Copy for Deps<'_, C> {}
 
 impl<S: Storage, A: Api, Q: Querier, C: CustomQuery> OwnedDeps<S, A, Q, C> {
     pub fn as_ref(&'_ self) -> Deps<'_, C> {
@@ -123,11 +123,10 @@ mod tests {
     #[derive(Clone, Serialize, Deserialize)]
     struct MyQuery;
     impl CustomQuery for MyQuery {}
+    impl CustomQuery for u64 {}
 
     #[test]
     fn deps_implements_copy() {
-        impl CustomQuery for u64 {}
-
         // With C: Copy
         let owned = OwnedDeps::<_, _, _, u64> {
             storage: MockStorage::default(),
diff --git a/packages/std/src/hex_binary.rs b/packages/std/src/hex_binary.rs
index 723db3850..d957af7a9 100644
--- a/packages/std/src/hex_binary.rs
+++ b/packages/std/src/hex_binary.rs
@@ -235,7 +235,7 @@ impl<'de> Deserialize<'de> for HexBinary {
 
 struct HexVisitor;
 
-impl<'de> de::Visitor<'de> for HexVisitor {
+impl de::Visitor<'_> for HexVisitor {
     type Value = HexBinary;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
@@ -255,7 +255,7 @@ impl<'de> de::Visitor<'de> for HexVisitor {
 
 struct BytesVisitor;
 
-impl<'de> de::Visitor<'de> for BytesVisitor {
+impl de::Visitor<'_> for BytesVisitor {
     type Value = HexBinary;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/math/decimal.rs b/packages/std/src/math/decimal.rs
index 19b1c0a29..1f1e07ccb 100644
--- a/packages/std/src/math/decimal.rs
+++ b/packages/std/src/math/decimal.rs
@@ -760,7 +760,7 @@ impl<'de> Deserialize<'de> for Decimal {
 
 struct DecimalVisitor;
 
-impl<'de> de::Visitor<'de> for DecimalVisitor {
+impl de::Visitor<'_> for DecimalVisitor {
     type Value = Decimal;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/math/decimal256.rs b/packages/std/src/math/decimal256.rs
index a37a0ffee..a2aa08d0a 100644
--- a/packages/std/src/math/decimal256.rs
+++ b/packages/std/src/math/decimal256.rs
@@ -762,7 +762,7 @@ impl<'de> Deserialize<'de> for Decimal256 {
 
 struct Decimal256Visitor;
 
-impl<'de> de::Visitor<'de> for Decimal256Visitor {
+impl de::Visitor<'_> for Decimal256Visitor {
     type Value = Decimal256;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/math/signed_decimal.rs b/packages/std/src/math/signed_decimal.rs
index 5dd82b10e..9b70ce334 100644
--- a/packages/std/src/math/signed_decimal.rs
+++ b/packages/std/src/math/signed_decimal.rs
@@ -885,7 +885,7 @@ impl<'de> Deserialize<'de> for SignedDecimal {
 
 struct SignedDecimalVisitor;
 
-impl<'de> de::Visitor<'de> for SignedDecimalVisitor {
+impl de::Visitor<'_> for SignedDecimalVisitor {
     type Value = SignedDecimal;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/math/signed_decimal_256.rs b/packages/std/src/math/signed_decimal_256.rs
index 3266c0b18..a7e838bb8 100644
--- a/packages/std/src/math/signed_decimal_256.rs
+++ b/packages/std/src/math/signed_decimal_256.rs
@@ -886,7 +886,7 @@ impl<'de> Deserialize<'de> for SignedDecimal256 {
 
 struct SignedDecimal256Visitor;
 
-impl<'de> de::Visitor<'de> for SignedDecimal256Visitor {
+impl de::Visitor<'_> for SignedDecimal256Visitor {
     type Value = SignedDecimal256;
 
     fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
diff --git a/packages/std/src/traits.rs b/packages/std/src/traits.rs
index e85706371..aafdf8095 100644
--- a/packages/std/src/traits.rs
+++ b/packages/std/src/traits.rs
@@ -340,7 +340,7 @@ pub struct QuerierWrapper<'a, C: CustomQuery = Empty> {
 // See "There is a small difference between the two: the derive strategy will also
 // place a Copy bound on type parameters, which isn’t always desired."
 // https://doc.rust-lang.org/std/marker/trait.Copy.html
-impl<'a, C: CustomQuery> Copy for QuerierWrapper<'a, C> {}
+impl<C: CustomQuery> Copy for QuerierWrapper<'_, C> {}
 
 /// This allows us to use self.raw_query to access the querier.
 /// It also allows external callers to access the querier easily.