diff --git a/include/ktl/containers/packed_ptr.h b/include/ktl/containers/packed_ptr.h
index 7abb09f..86f0da5 100644
--- a/include/ktl/containers/packed_ptr.h
+++ b/include/ktl/containers/packed_ptr.h
@@ -32,11 +32,13 @@ namespace ktl
 		explicit packed_ptr(PtrT p, Int value) noexcept :
 			m_Value((reinterpret_cast<uintptr_t>(p) & PTR_MASK) | (static_cast<uintptr_t>(value) & INT_MASK))
 		{
+			static_assert(std::is_unsigned_v<Int>, "Packed integer must be unsigned");
+
 			// Pointer must be correctly aligned
 			KTL_ASSERT((reinterpret_cast<size_t>(p) & (Alignment - 1)) == 0);
 		}
 
-		operator bool() const noexcept { return m_Value; }
+		explicit operator bool() const noexcept { return m_Value; }
 
 		PtrT get_ptr() const noexcept { return reinterpret_cast<PtrT>(m_Value & PTR_MASK); }
 
diff --git a/include/ktl/containers/trivial_vector.h b/include/ktl/containers/trivial_vector.h
index d194b60..a3a982a 100644
--- a/include/ktl/containers/trivial_vector.h
+++ b/include/ktl/containers/trivial_vector.h
@@ -45,7 +45,7 @@ namespace ktl
 		 * @brief Construct the vector with the given allocator
 		 * @param allocator The allocator to use
 		*/
-		trivial_vector(const Alloc& allocator) noexcept :
+		explicit trivial_vector(const Alloc& allocator) noexcept :
 			m_Alloc(allocator),
 			m_Begin(nullptr),
 			m_End(nullptr),