diff --git a/extism_pdk.go b/extism_pdk.go
index 3410791..d3f1414 100644
--- a/extism_pdk.go
+++ b/extism_pdk.go
@@ -92,7 +92,9 @@ func OutputJSON(v any) error {
 		return err
 	}
 
-	OutputMemory(AllocateBytes(b))
+	mem := AllocateBytes(b)
+	defer mem.Free()
+	OutputMemory(mem)
 	return nil
 }
 
@@ -149,6 +151,7 @@ func SetError(err error) {
 
 func SetErrorString(err string) {
 	mem := AllocateString(err)
+	defer mem.Free()
 	extism_error_set(mem.offset)
 }
 
@@ -190,6 +193,7 @@ func Log(level LogLevel, s string) {
 
 func GetVar(key string) []byte {
 	mem := AllocateBytes([]byte(key))
+	defer mem.Free()
 
 	offset := extism_var_get(mem.offset)
 	clength := extism_length(offset)
@@ -215,6 +219,7 @@ func SetVar(key string, value []byte) {
 
 func GetVarInt(key string) int {
 	mem := AllocateBytes([]byte(key))
+	defer mem.Free()
 
 	offset := extism_var_get(mem.offset)
 	clength := extism_length(offset)
@@ -243,6 +248,7 @@ func SetVarInt(key string, value int) {
 
 func RemoveVar(key string) {
 	mem := AllocateBytes([]byte(key))
+	defer mem.Free()
 	extism_var_set(mem.offset, 0)
 }