diff --git a/common/crypto/attestation-api/evidence/verify-evidence.cpp b/common/crypto/attestation-api/evidence/verify-evidence.cpp
index 86a2c8e68..70727c536 100644
--- a/common/crypto/attestation-api/evidence/verify-evidence.cpp
+++ b/common/crypto/attestation-api/evidence/verify-evidence.cpp
@@ -64,6 +64,7 @@ void url_decode_ias_certificate(std::string& s)
     replace_all_substrings(s, "%0A", "\n");
     replace_all_substrings(s, "%2B", "+");
     replace_all_substrings(s, "%3D", "=");
+    replace_all_substrings(s, "%2F", "/");
 }
 
 bool split_certificates(