diff --git a/_examples/rsa_decrypt_oaep.md b/_examples/rsa_decrypt_oaep.md
index 63d47f6..fbea72b 100644
--- a/_examples/rsa_decrypt_oaep.md
+++ b/_examples/rsa_decrypt_oaep.md
@@ -20,7 +20,6 @@ int main(int argc, char** argv) {
     unsigned int dst_decrypt_len;
     unsigned char* dst_decrypt;
 
-    // Determine the size of the output
     if (crypsi_rsa_decrypt_oaep_sha256(rsa_private_key_char, message, strlen(message), &dst_decrypt, &dst_decrypt_len) != 0) {
         printf("crypsi_rsa_decrypt_oaep_sha256 failed\n");
         exit(1);
diff --git a/_examples/rsa_digital_signature.md b/_examples/rsa_digital_signature.md
index bbe8cf8..dbbae66 100644
--- a/_examples/rsa_digital_signature.md
+++ b/_examples/rsa_digital_signature.md
@@ -19,7 +19,6 @@ int main(int argc, char** argv) {
     unsigned int dst_signature_len;
     unsigned char* dst_signature;
 
-    // Determine the size of the output
     if (crypsi_rsa_sign_pss_sha256(rsa_private_key_char, message, strlen(message), &dst_signature, &dst_signature_len) != 0) {
         printf("crypsi_rsa_sign_pss_sha256 failed\n");
         exit(1);
@@ -27,7 +26,7 @@ int main(int argc, char** argv) {
 
     printf("rsa signature result: %s\n", dst_signature);
 
-    
+    free((void*) dst_signature);
     free((void*) rsa_private_key_char);
 
     return 0;
diff --git a/_examples/rsa_encrypt_oaep.md b/_examples/rsa_encrypt_oaep.md
index a4d0500..93688fd 100644
--- a/_examples/rsa_encrypt_oaep.md
+++ b/_examples/rsa_encrypt_oaep.md
@@ -20,7 +20,6 @@ int main(int argc, char** argv) {
     unsigned int dst_encrypt_len;
     unsigned char* dst_encrypt;
 
-    // Determine the size of the output
     if (crypsi_rsa_encrypt_oaep_md5(rsa_public_key_char, message, strlen(message), &dst_encrypt, &dst_encrypt_len) != 0) {
         printf("crypsi_rsa_encrypt_oaep_md5 failed\n");
         exit(1);