diff --git a/halo2_gadgets/Cargo.toml b/halo2_gadgets/Cargo.toml
index 35a24328..6025ef72 100644
--- a/halo2_gadgets/Cargo.toml
+++ b/halo2_gadgets/Cargo.toml
@@ -28,7 +28,7 @@ ff = "0.12"
 group = "0.12"
 halo2_proofs = { version = "0.2", path = "../halo2_proofs" }
 lazy_static = "1"
-halo2curves = { git = 'https://github.com/privacy-scaling-explorations/halo2curves', tag = 'v0.2.0' }
+halo2curves = { git = 'https://github.com/privacy-scaling-explorations/halo2curves', tag = '0.3.0' }
 proptest = { version = "1.0.0", optional = true }
 rand = "0.8"
 subtle = "2.3"
diff --git a/halo2_proofs/Cargo.toml b/halo2_proofs/Cargo.toml
index 8b8dee7f..abf20006 100644
--- a/halo2_proofs/Cargo.toml
+++ b/halo2_proofs/Cargo.toml
@@ -48,7 +48,7 @@ backtrace = { version = "0.3", optional = true }
 rayon = "1.5.1"
 ff = "0.12"
 group = "0.12"
-halo2curves = { git = 'https://github.com/privacy-scaling-explorations/halo2curves', tag = "0.2.1" }
+halo2curves = { git = 'https://github.com/privacy-scaling-explorations/halo2curves', tag = '0.3.0' }
 rand_core = { version = "0.6", default-features = false }
 tracing = "0.1"
 blake2b_simd = "1"
diff --git a/rust-toolchain b/rust-toolchain
index cc99c5da..af92bdd9 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2022-07-26
+1.63.0