diff --git a/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingContext.cs b/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingContext.cs
index f9f8e8657e..2d8c79b11b 100644
--- a/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingContext.cs
+++ b/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingContext.cs
@@ -65,7 +65,7 @@ namespace Microsoft.AspNetCore.ResponseCaching.Internal
                 {
                     _parsedResponseDate = true;
                     DateTimeOffset date;
-                    if (HeaderUtilities.TryParseDate(HttpContext.Response.Headers[HeaderNames.Date], out date))
+                    if (HeaderUtilities.TryParseDate(HttpContext.Response.Headers[HeaderNames.Date].ToString(), out date))
                     {
                         _responseDate = date;
                     }
@@ -92,7 +92,7 @@ namespace Microsoft.AspNetCore.ResponseCaching.Internal
                 {
                     _parsedResponseExpires = true;
                     DateTimeOffset expires;
-                    if (HeaderUtilities.TryParseDate(HttpContext.Response.Headers[HeaderNames.Expires], out expires))
+                    if (HeaderUtilities.TryParseDate(HttpContext.Response.Headers[HeaderNames.Expires].ToString(), out expires))
                     {
                         _responseExpires = expires;
                     }
diff --git a/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingPolicyProvider.cs b/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingPolicyProvider.cs
index 2108ff3a2b..8ffc59612e 100644
--- a/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingPolicyProvider.cs
+++ b/src/Microsoft.AspNetCore.ResponseCaching/Internal/ResponseCachingPolicyProvider.cs
@@ -233,7 +233,7 @@ namespace Microsoft.AspNetCore.ResponseCaching.Internal
                 {
                     // Validate expiration
                     DateTimeOffset expires;
-                    if (HeaderUtilities.TryParseDate(context.CachedResponseHeaders[HeaderNames.Expires], out expires) &&
+                    if (HeaderUtilities.TryParseDate(context.CachedResponseHeaders[HeaderNames.Expires].ToString(), out expires) &&
                         context.ResponseTime.Value >= expires)
                     {
                         context.Logger.LogExpirationExpiresExceeded(context.ResponseTime.Value, expires);
diff --git a/src/Microsoft.AspNetCore.ResponseCaching/ResponseCachingMiddleware.cs b/src/Microsoft.AspNetCore.ResponseCaching/ResponseCachingMiddleware.cs
index 1e8890cfe3..24fa3c1c40 100644
--- a/src/Microsoft.AspNetCore.ResponseCaching/ResponseCachingMiddleware.cs
+++ b/src/Microsoft.AspNetCore.ResponseCaching/ResponseCachingMiddleware.cs
@@ -464,14 +464,14 @@ namespace Microsoft.AspNetCore.ResponseCaching
                 if (!StringValues.IsNullOrEmpty(ifModifiedSince))
                 {
                     DateTimeOffset modified;
-                    if (!HeaderUtilities.TryParseDate(cachedResponseHeaders[HeaderNames.LastModified], out modified) &&
-                        !HeaderUtilities.TryParseDate(cachedResponseHeaders[HeaderNames.Date], out modified))
+                    if (!HeaderUtilities.TryParseDate(cachedResponseHeaders[HeaderNames.LastModified].ToString(), out modified) &&
+                        !HeaderUtilities.TryParseDate(cachedResponseHeaders[HeaderNames.Date].ToString(), out modified))
                     {
                         return false;
                     }
 
                     DateTimeOffset modifiedSince;
-                    if (HeaderUtilities.TryParseDate(ifModifiedSince, out modifiedSince) &&
+                    if (HeaderUtilities.TryParseDate(ifModifiedSince.ToString(), out modifiedSince) &&
                         modified <= modifiedSince)
                     {
                         context.Logger.LogNotModifiedIfModifiedSinceSatisfied(modified, modifiedSince);