diff --git a/src/serialize.h b/src/serialize.h
index 98851056bdb..b2f1ccd9cb1 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -253,14 +253,14 @@ template<class T>
 concept CharNotInt8 = std::same_as<T, char> && !std::same_as<T, int8_t>;
 
 template <typename Stream, CharNotInt8 V> void Serialize(Stream&, V) = delete; // char serialization forbidden. Use uint8_t or int8_t
-template <typename Stream> void Serialize(Stream& s, std::byte a) { ser_writedata8(s, uint8_t(a)); }
-template<typename Stream> inline void Serialize(Stream& s, int8_t a  ) { ser_writedata8(s, a); }
+template <typename Stream> void Serialize(Stream& s, std::byte a) { ser_writedata8(s, static_cast<uint8_t>(a)); }
+template<typename Stream> inline void Serialize(Stream& s, int8_t a  ) { ser_writedata8(s, static_cast<uint8_t>(a)); }
 template<typename Stream> inline void Serialize(Stream& s, uint8_t a ) { ser_writedata8(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int16_t a ) { ser_writedata16(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int16_t a ) { ser_writedata16(s, static_cast<uint16_t>(a)); }
 template<typename Stream> inline void Serialize(Stream& s, uint16_t a) { ser_writedata16(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int32_t a ) { ser_writedata32(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int32_t a ) { ser_writedata32(s, static_cast<uint32_t>(a)); }
 template<typename Stream> inline void Serialize(Stream& s, uint32_t a) { ser_writedata32(s, a); }
-template<typename Stream> inline void Serialize(Stream& s, int64_t a ) { ser_writedata64(s, a); }
+template<typename Stream> inline void Serialize(Stream& s, int64_t a ) { ser_writedata64(s, static_cast<uint64_t>(a)); }
 template<typename Stream> inline void Serialize(Stream& s, uint64_t a) { ser_writedata64(s, a); }
 template <typename Stream, BasicByte B, int N> void Serialize(Stream& s, const B (&a)[N]) { s.write(MakeByteSpan(a)); }
 template <typename Stream, BasicByte B, std::size_t N> void Serialize(Stream& s, const std::array<B, N>& a) { s.write(MakeByteSpan(a)); }
@@ -269,13 +269,13 @@ template <typename Stream, BasicByte B> void Serialize(Stream& s, std::span<B> s
 
 template <typename Stream, CharNotInt8 V> void Unserialize(Stream&, V) = delete; // char serialization forbidden. Use uint8_t or int8_t
 template <typename Stream> void Unserialize(Stream& s, std::byte& a) { a = std::byte{ser_readdata8(s)}; }
-template<typename Stream> inline void Unserialize(Stream& s, int8_t& a  ) { a = ser_readdata8(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int8_t& a  ) { a = static_cast<int8_t>(ser_readdata8(s)); }
 template<typename Stream> inline void Unserialize(Stream& s, uint8_t& a ) { a = ser_readdata8(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int16_t& a ) { a = ser_readdata16(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int16_t& a ) { a = static_cast<int16_t>(ser_readdata16(s)); }
 template<typename Stream> inline void Unserialize(Stream& s, uint16_t& a) { a = ser_readdata16(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int32_t& a ) { a = ser_readdata32(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int32_t& a ) { a = static_cast<int32_t>(ser_readdata32(s)); }
 template<typename Stream> inline void Unserialize(Stream& s, uint32_t& a) { a = ser_readdata32(s); }
-template<typename Stream> inline void Unserialize(Stream& s, int64_t& a ) { a = ser_readdata64(s); }
+template<typename Stream> inline void Unserialize(Stream& s, int64_t& a ) { a = static_cast<int64_t>(ser_readdata64(s)); }
 template<typename Stream> inline void Unserialize(Stream& s, uint64_t& a) { a = ser_readdata64(s); }
 template <typename Stream, BasicByte B, int N> void Unserialize(Stream& s, B (&a)[N]) { s.read(MakeWritableByteSpan(a)); }
 template <typename Stream, BasicByte B, std::size_t N> void Unserialize(Stream& s, std::array<B, N>& a) { s.read(MakeWritableByteSpan(a)); }
diff --git a/test/sanitizer_suppressions/ubsan b/test/sanitizer_suppressions/ubsan
index acdae7415d2..2857af87a77 100644
--- a/test/sanitizer_suppressions/ubsan
+++ b/test/sanitizer_suppressions/ubsan
@@ -54,7 +54,6 @@ unsigned-integer-overflow:DecompressAmount
 unsigned-integer-overflow:crypto/
 unsigned-integer-overflow:MurmurHash3
 unsigned-integer-overflow:TxConfirmStats::EstimateMedianVal
-unsigned-integer-overflow:prevector.h
 unsigned-integer-overflow:InsecureRandomContext::rand64
 unsigned-integer-overflow:InsecureRandomContext::SplitMix64
 unsigned-integer-overflow:bitset_detail::PopCount
@@ -62,10 +61,8 @@ implicit-integer-sign-change:SetStdinEcho
 implicit-integer-sign-change:compressor.h
 implicit-integer-sign-change:crypto/
 implicit-integer-sign-change:TxConfirmStats::removeTx
-implicit-integer-sign-change:prevector.h
 implicit-integer-sign-change:verify_flags
 implicit-integer-sign-change:EvalScript
-implicit-integer-sign-change:serialize.h
 implicit-signed-integer-truncation:crypto/
 implicit-unsigned-integer-truncation:crypto/
 shift-base:arith_uint256.cpp