diff --git a/windows/Sources/Sandbox/ProcThreadAttributes.swift b/windows/Sources/Sandbox/ProcThreadAttributes.swift
index 7662f5b..325f61f 100644
--- a/windows/Sources/Sandbox/ProcThreadAttributes.swift
+++ b/windows/Sources/Sandbox/ProcThreadAttributes.swift
@@ -85,6 +85,10 @@ class SecurityCapabilitiesProcThreadAttribute: ProcThreadAttribute {
     )
   }
 
+  deinit {
+    self.securityCapabilities.deallocate()
+  }
+
   func apply(_ attributeList: inout LPPROC_THREAD_ATTRIBUTE_LIST) throws {
     try updateProcThreadAttribute(
       attributeList: &attributeList,
@@ -103,6 +107,10 @@ class LessPrivilegedAppContainerProcThreadAttribute: ProcThreadAttribute {
     self.enabled.pointee = 1
   }
 
+  deinit {
+    self.enabled.deallocate()
+  }
+
   func apply(_ attributeList: inout LPPROC_THREAD_ATTRIBUTE_LIST) throws {
     try updateProcThreadAttribute(
       attributeList: &attributeList,