diff --git a/update_metadata.proto b/update_metadata.proto
index d318a62..3f454ad 100644
--- a/update_metadata.proto
+++ b/update_metadata.proto
@@ -146,25 +146,6 @@
   optional bytes hash = 2;
 }
 
-// Describe an image we are based on in a human friendly way.
-// Examples:
-//   dev-channel, x86-alex, 1.2.3, mp-v3
-//   nplusone-channel, x86-alex, 1.2.4, mp-v3, dev-channel, 1.2.3
-//
-// All fields will be set, if this message is present.
-message ImageInfo {
-  optional string board = 1 [deprecated = true];
-  optional string key = 2 [deprecated = true];
-  optional string channel = 3 [deprecated = true];
-  optional string version = 4 [deprecated = true];
-
-  // If these values aren't present, they should be assumed to match
-  // the equivalent value above. They are normally only different for
-  // special image types such as nplusone images.
-  optional string build_channel = 5 [deprecated = true];
-  optional string build_version = 6 [deprecated = true];
-}
-
 message InstallOperation {
   enum Type {
     REPLACE = 0;     // Replace destination extents w/ attached data.
@@ -401,8 +382,7 @@
   // Only present in major version = 1. List of install operations for the
   // kernel and rootfs partitions. For major version = 2 see the |partitions|
   // field.
-  repeated InstallOperation install_operations = 1 [deprecated = true];
-  repeated InstallOperation kernel_install_operations = 2 [deprecated = true];
+  reserved 1, 2;
 
   // (At time of writing) usually 4096
   optional uint32 block_size = 3 [default = 4096];
@@ -415,17 +395,8 @@
   optional uint64 signatures_offset = 4;
   optional uint64 signatures_size = 5;
 
-  // Only present in major version = 1. Partition metadata used to validate the
-  // update. For major version = 2 see the |partitions| field.
-  optional PartitionInfo old_kernel_info = 6 [deprecated = true];
-  optional PartitionInfo new_kernel_info = 7 [deprecated = true];
-  optional PartitionInfo old_rootfs_info = 8 [deprecated = true];
-  optional PartitionInfo new_rootfs_info = 9 [deprecated = true];
-
-  // old_image_info will only be present for delta images.
-  optional ImageInfo old_image_info = 10 [deprecated = true];
-
-  optional ImageInfo new_image_info = 11 [deprecated = true];
+  // Fields deprecated in major version 2.
+  reserved 6,7,8,9,10,11;
 
   // The minor version, also referred as "delta version", of the payload.
   // Minor version 0 is full payload, everything else is delta payload.