diff --git a/Package.swift b/Package.swift
index 9efba43..b3ade77 100644
--- a/Package.swift
+++ b/Package.swift
@@ -40,6 +40,7 @@ let package = Package(
       swiftSettings: [
         .enableExperimentalFeature("Lifetimes"),
         .strictMemorySafety(),
+        .treatWarning("StrictMemorySafety", as: .error),
       ]
     ),
     .macro(
diff --git a/Sources/BinaryParsing/Parser Types/Slicing.swift b/Sources/BinaryParsing/Parser Types/Slicing.swift
index 8ab1311..b97d81c 100644
--- a/Sources/BinaryParsing/Parser Types/Slicing.swift	
+++ b/Sources/BinaryParsing/Parser Types/Slicing.swift	
@@ -192,7 +192,7 @@ extension ParserSpan {
   {
     let rawSpan = try sliceSpan(byteCount: byteCount).bytes
     do {
-      let span = Span<UInt8>(_bytes: rawSpan)
+      let span = unsafe Span<UInt8>(_bytes: rawSpan)
       return try UTF8Span(validating: span)
     } catch {
       throw ParsingError(status: .userError, location: startPosition)
diff --git a/Tests/BinaryParsingTests/OptimizationTests.swift b/Tests/BinaryParsingTests/OptimizationTests.swift
index 1b0f9d6..d824b2b 100644
--- a/Tests/BinaryParsingTests/OptimizationTests.swift
+++ b/Tests/BinaryParsingTests/OptimizationTests.swift
@@ -26,10 +26,10 @@ private let data: [UInt8] = [
 struct OptimizationTests {
   func precheckParseFour(parsing input: inout ParserSpan) throws -> Int {
     try input._checkCount(minimum: 16)
-    let a = UInt32(_unchecked: (), parsingBigEndian: &input)
-    let b = UInt32(_unchecked: (), parsingBigEndian: &input)
-    let c = UInt32(_unchecked: (), parsingBigEndian: &input)
-    let d = UInt32(_unchecked: (), parsingBigEndian: &input)
+    let a = unsafe UInt32(_unchecked: (), parsingBigEndian: &input)
+    let b = unsafe UInt32(_unchecked: (), parsingBigEndian: &input)
+    let c = unsafe UInt32(_unchecked: (), parsingBigEndian: &input)
+    let d = unsafe UInt32(_unchecked: (), parsingBigEndian: &input)
     return Int(a + b + c + d)
   }
 
diff --git a/Tests/BinaryParsingTests/TestingSupport.swift b/Tests/BinaryParsingTests/TestingSupport.swift
index ef7a2ec..fd68fff 100644
--- a/Tests/BinaryParsingTests/TestingSupport.swift
+++ b/Tests/BinaryParsingTests/TestingSupport.swift
@@ -19,9 +19,9 @@ func === (lhs: borrowing ParserSpan, rhs: borrowing ParserSpan) -> Bool {
     lhs.count == rhs.count
   else { return false }
 
-  return lhs.withUnsafeBytes { lhs in
-    rhs.withUnsafeBytes { rhs in
-      (lhs.baseAddress, lhs.count) == (rhs.baseAddress, rhs.count)
+  return unsafe lhs.withUnsafeBytes { lhs in
+    unsafe rhs.withUnsafeBytes { rhs in
+      unsafe (lhs.baseAddress, lhs.count) == (rhs.baseAddress, rhs.count)
     }
   }
 }
@@ -87,7 +87,7 @@ extension Array where Element == UInt8 {
         if T.isSigned && value < 0 { 0xff } else { 0x00 }
       }
     self =
-      Array(repeating: paddingByte, count: paddingCount)
+      unsafe Array(repeating: paddingByte, count: paddingCount)
       + Swift.withUnsafeBytes(of: value.bigEndian, Array.init)
   }
 
@@ -105,7 +105,7 @@ extension Array where Element == UInt8 {
         if T.isSigned && value < 0 { 0xff } else { 0x00 }
       }
     self =
-      Swift.withUnsafeBytes(of: value.littleEndian, Array.init)
+      unsafe Swift.withUnsafeBytes(of: value.littleEndian, Array.init)
       + Array(repeating: paddingByte, count: paddingCount)
   }
 
diff --git a/Xcode/Shared.xcconfig b/Xcode/Shared.xcconfig
index 173ed92..0a2e61f 100644
--- a/Xcode/Shared.xcconfig
+++ b/Xcode/Shared.xcconfig
@@ -21,6 +21,10 @@ CODE_SIGN_IDENTITY[sdk=watchos*] = "iOS Developer"
 CODE_SIGN_IDENTITY[sdk=appletvos*] = "iOS Developer"
 
 SWIFT_VERSION = 6
+SWIFT_STRICT_MEMORY_SAFETY = YES
+SWIFT_WARNINGS_AS_ERRORS_GROUPS = StrictMemorySafety
+SWIFT_STRICT_CONCURRENCY = complete
+
 ONLY_ACTIVE_ARCH[config=Debug] = YES
 
 SWIFT_COMPILATION_MODE[config=Release] = wholemodule