diff --git a/Cargo.lock b/Cargo.lock
index bb5bad5547..c934309a27 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1667,7 +1667,7 @@ dependencies = [
 [[package]]
 name = "dfx-core"
 version = "0.0.1"
-source = "git+https://github.com/hpeebles/dfinity-sdk?rev=d39dde0611fda8f30a6796b40b1dbb13a0541597#d39dde0611fda8f30a6796b40b1dbb13a0541597"
+source = "git+https://github.com/dfinity/sdk?rev=c7fa9267950836fb2e8af2f03a6531ead9289f81#c7fa9267950836fb2e8af2f03a6531ead9289f81"
 dependencies = [
  "aes-gcm",
  "argon2",
@@ -2103,7 +2103,7 @@ dependencies = [
 [[package]]
 name = "event_sink_canister"
 version = "0.1.0"
-source = "git+https://github.com/open-chat-labs/event-sink?rev=e8e4a547f767ef568ddf978c6cc421a1ef05485e#e8e4a547f767ef568ddf978c6cc421a1ef05485e"
+source = "git+https://github.com/open-chat-labs/event-sink?rev=598a846ae880e6bb691809bae1c0839180381883#598a846ae880e6bb691809bae1c0839180381883"
 dependencies = [
  "candid",
  "serde",
@@ -2113,7 +2113,7 @@ dependencies = [
 [[package]]
 name = "event_sink_client"
 version = "0.1.0"
-source = "git+https://github.com/open-chat-labs/event-sink?rev=e8e4a547f767ef568ddf978c6cc421a1ef05485e#e8e4a547f767ef568ddf978c6cc421a1ef05485e"
+source = "git+https://github.com/open-chat-labs/event-sink?rev=598a846ae880e6bb691809bae1c0839180381883#598a846ae880e6bb691809bae1c0839180381883"
 dependencies = [
  "event_sink_canister",
  "ic_principal",
@@ -2123,7 +2123,7 @@ dependencies = [
 [[package]]
 name = "event_sink_client_cdk_runtime"
 version = "0.1.0"
-source = "git+https://github.com/open-chat-labs/event-sink?rev=e8e4a547f767ef568ddf978c6cc421a1ef05485e#e8e4a547f767ef568ddf978c6cc421a1ef05485e"
+source = "git+https://github.com/open-chat-labs/event-sink?rev=598a846ae880e6bb691809bae1c0839180381883#598a846ae880e6bb691809bae1c0839180381883"
 dependencies = [
  "event_sink_canister",
  "event_sink_client",
@@ -2138,7 +2138,7 @@ dependencies = [
 [[package]]
 name = "event_sink_utils"
 version = "0.1.0"
-source = "git+https://github.com/open-chat-labs/event-sink?rev=e8e4a547f767ef568ddf978c6cc421a1ef05485e#e8e4a547f767ef568ddf978c6cc421a1ef05485e"
+source = "git+https://github.com/open-chat-labs/event-sink?rev=598a846ae880e6bb691809bae1c0839180381883#598a846ae880e6bb691809bae1c0839180381883"
 dependencies = [
  "serde",
 ]
@@ -2949,9 +2949,9 @@ dependencies = [
 
 [[package]]
 name = "ic-agent"
-version = "0.32.0"
+version = "0.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "410a8c1bdd647dfc43978497e8f794378a18eeb3ec7c768b92c3885c999e1d1b"
+checksum = "f32c4711ca94eee9b7966116698b69ca99e7e24cba68c1f3dd86f2ed70218a7e"
 dependencies = [
  "backoff",
  "cached",
@@ -2966,6 +2966,7 @@ dependencies = [
  "ic-verify-bls-signature",
  "k256 0.13.1",
  "leb128",
+ "p256",
  "pem 2.0.1",
  "pkcs8 0.10.2",
  "rand",
@@ -3040,9 +3041,9 @@ dependencies = [
 
 [[package]]
 name = "ic-identity-hsm"
-version = "0.32.0"
+version = "0.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "478f1fb56cdda5959ac4a685dbe74c56f25226212defb34ab5cf136f4b919344"
+checksum = "e9d363914507e81896a6edd1768aa2524bd923b94ed4c27a9793a90b0880f741"
 dependencies = [
  "hex",
  "ic-agent",
@@ -3078,9 +3079,9 @@ dependencies = [
 
 [[package]]
 name = "ic-transport-types"
-version = "0.32.0"
+version = "0.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cb030f03ef8332fbf8eda6bb25e80d8354d2bef88b27e671b3c167d9ee8e7a7"
+checksum = "d595b9f72e5952bcb22e5cda37ae1c8d6579a24aaa224b63b8d245f386bdcbb2"
 dependencies = [
  "candid",
  "hex",
@@ -3095,9 +3096,9 @@ dependencies = [
 
 [[package]]
 name = "ic-utils"
-version = "0.32.0"
+version = "0.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2921308283f89a431872ba63f5ece9ffe6eadf7bc4cc5d12239eae146c7db8f0"
+checksum = "a8e26bd17f2f188a608deae41b8c269a85e1e98118c9a7aa0803ad252552c0b2"
 dependencies = [
  "async-trait",
  "candid",
@@ -5189,9 +5190,9 @@ dependencies = [
 
 [[package]]
 name = "reqwest"
-version = "0.11.22"
+version = "0.11.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
+checksum = "c6920094eb85afde5e4a138be3f2de8bbdf28000f0029e72c45025a56b042251"
 dependencies = [
  "base64 0.21.5",
  "bytes",
@@ -5203,13 +5204,11 @@ dependencies = [
  "http-body",
  "hyper",
  "hyper-rustls",
- "hyper-tls",
  "ipnet",
  "js-sys",
  "log",
  "mime",
  "mime_guess",
- "native-tls",
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
@@ -5218,9 +5217,9 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_urlencoded",
+ "sync_wrapper",
  "system-configuration",
  "tokio",
- "tokio-native-tls",
  "tokio-rustls",
  "tokio-util",
  "tower-service",
@@ -6354,6 +6353,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "sync_wrapper"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
+
 [[package]]
 name = "synstructure"
 version = "0.12.6"
@@ -7260,9 +7265,9 @@ checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
 
 [[package]]
 name = "wasm-streams"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4609d447824375f43e1ffbc051b50ad8f4b3ae8219680c94452ea05eb240ac7"
+checksum = "b65dc4c90b63b118468cf747d8bf3566c1913ef60be765b5730ead9e0a3ba129"
 dependencies = [
  "futures-util",
  "js-sys",
diff --git a/Cargo.toml b/Cargo.toml
index 225becc5d1..5248f3c2df 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -158,24 +158,24 @@ candid = "0.10.3"
 canister_sig_util = { git = "https://github.com/dfinity/internet-identity", rev = "f46da3bfefff638a844117606a4dea70b2dd4405" }
 ciborium = "0.2.1"
 clap = "4.4.8"
-dfx-core = { git = "https://github.com/hpeebles/dfinity-sdk", rev = "d39dde0611fda8f30a6796b40b1dbb13a0541597" }
+dfx-core = { git = "https://github.com/dfinity/sdk", rev = "c7fa9267950836fb2e8af2f03a6531ead9289f81" }
 dirs = "5.0.1"
 dotenv = "0.15.0"
-event_sink_canister = { git = "https://github.com/open-chat-labs/event-sink", rev = "e8e4a547f767ef568ddf978c6cc421a1ef05485e" }
-event_sink_client = { git = "https://github.com/open-chat-labs/event-sink", rev = "e8e4a547f767ef568ddf978c6cc421a1ef05485e" }
-event_sink_client_cdk_runtime = { git = "https://github.com/open-chat-labs/event-sink", rev = "e8e4a547f767ef568ddf978c6cc421a1ef05485e" }
-event_sink_utils = { git = "https://github.com/open-chat-labs/event-sink", rev = "e8e4a547f767ef568ddf978c6cc421a1ef05485e" }
+event_sink_canister = { git = "https://github.com/open-chat-labs/event-sink", rev = "598a846ae880e6bb691809bae1c0839180381883" }
+event_sink_client = { git = "https://github.com/open-chat-labs/event-sink", rev = "598a846ae880e6bb691809bae1c0839180381883" }
+event_sink_client_cdk_runtime = { git = "https://github.com/open-chat-labs/event-sink", rev = "598a846ae880e6bb691809bae1c0839180381883" }
+event_sink_utils = { git = "https://github.com/open-chat-labs/event-sink", rev = "598a846ae880e6bb691809bae1c0839180381883" }
 futures = "0.3.29"
 getrandom = { version = "0.2.11", features = ["custom"] }
 hex = "0.4.3"
-ic-agent = "0.32.0"
+ic-agent = "0.33.0"
 ic-cdk = "=0.12.0"
 ic-cdk-macros = "0.8.4"
 ic-cdk-timers = "0.6.0"
 ic-ledger-types = "0.9.0"
 ic-stable-structures = "0.6.2"
-ic-transport-types = "0.32.0"
-ic-utils = "0.32.0"
+ic-transport-types = "0.33.0"
+ic-utils = "0.33.0"
 icrc-ledger-types = "0.1.5"
 ic0 = "0.21.1"
 itertools = "0.11.0"
diff --git a/backend/canisters/user_index/impl/src/lifecycle/post_upgrade.rs b/backend/canisters/user_index/impl/src/lifecycle/post_upgrade.rs
index 4c44c40509..b1a31f1ec3 100644
--- a/backend/canisters/user_index/impl/src/lifecycle/post_upgrade.rs
+++ b/backend/canisters/user_index/impl/src/lifecycle/post_upgrade.rs
@@ -1,6 +1,6 @@
 use crate::lifecycle::{init_env, init_state};
 use crate::memory::get_upgrades_memory;
-use crate::{mutate_state, Data};
+use crate::{mutate_state, Data, UserRegisteredEventPayload};
 use canister_logger::LogEntry;
 use canister_tracing_macros::trace;
 use ic_cdk_macros::post_upgrade;
@@ -36,5 +36,24 @@ fn post_upgrade(args: Args) {
 
             crate::jobs::sync_legacy_user_principals::start_job_if_required(state);
         }
+
+        let source = Some(state.env.canister_id().to_text());
+
+        // Push an event for each user who registered before the previous upgrade
+        for user in state.data.users.iter().filter(|u| u.date_created < 1707486762394) {
+            let payload = serde_json::to_vec(&UserRegisteredEventPayload {
+                referred: user.referred_by.is_some(),
+                is_bot: user.is_bot,
+            })
+            .unwrap();
+
+            state.data.event_sink_client.push_event(event_sink_client::Event {
+                name: "user_registered".to_string(),
+                timestamp: user.date_created,
+                user: Some(user.user_id.to_string()),
+                source: source.clone(),
+                payload,
+            });
+        }
     });
 }