diff --git a/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/EnclaveDelegate.Crypto.cs b/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/EnclaveDelegate.Crypto.cs
index fbc2b50523..fdd2812d1b 100644
--- a/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/EnclaveDelegate.Crypto.cs
+++ b/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/EnclaveDelegate.Crypto.cs
@@ -10,7 +10,7 @@ namespace Microsoft.Data.SqlClient
 {
     internal sealed partial class EnclaveDelegate
     {
-        private static readonly Dictionary<SqlConnectionAttestationProtocol, SqlColumnEncryptionEnclaveProvider> s_enclaveProviders = new Dictionary<SqlConnectionAttestationProtocol, SqlColumnEncryptionEnclaveProvider>();
+        private static readonly ConcurrentDictionary<SqlConnectionAttestationProtocol, SqlColumnEncryptionEnclaveProvider> s_enclaveProviders = new();
 
         /// <summary>
         /// Create a new enclave session