diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 288ceea..1358432 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        nim: [1.6.14]
+        nim: [1.6.14, 2.0.14]
     steps:
     - uses: actions/checkout@v2
     - uses: iffy/install-nim@v3
diff --git a/.gitignore b/.gitignore
index becd7f9..41f61d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *
 !*/
 !*.*
+.nimble
+poseidon2.out
\ No newline at end of file
diff --git a/nimble.lock b/nimble.lock
new file mode 100644
index 0000000..f2ddf6e
--- /dev/null
+++ b/nimble.lock
@@ -0,0 +1,16 @@
+{
+  "version": 2,
+  "packages": {
+    "constantine": {
+      "version": "0.1.0",
+      "vcsRevision": "bc3845aa492b52f7fef047503b1592e830d1a774",
+      "url": "https://github.com/mratsim/constantine",
+      "downloadMethod": "git",
+      "dependencies": [],
+      "checksums": {
+        "sha1": "09594d4ce93e83ae377a7a9cb8fd4472b104ca4b"
+      }
+    }
+  },
+  "tasks": {}
+}
diff --git a/poseidon2.nim b/poseidon2.nim
index 694f12b..68792f5 100644
--- a/poseidon2.nim
+++ b/poseidon2.nim
@@ -16,5 +16,5 @@ export elements
 export types
 
 # workaround for "undeclared identifier: 'getCurveOrder'"
-import constantine/math/config/curves
-export curves
+import constantine/named/algebras
+export algebras
diff --git a/poseidon2.nimble b/poseidon2.nimble
index 131eac7..cf21d46 100644
--- a/poseidon2.nimble
+++ b/poseidon2.nimble
@@ -3,4 +3,4 @@ author = "nim-poseidon2 authors"
 description = "Poseidon2 hash function"
 license = "MIT"
 
-requires "https://github.com/mratsim/constantine#ab6fa6ae1bbbd1b10071a92ec209b381b5d82511"
+requires "https://github.com/mratsim/constantine#bc3845aa492b52f7fef047503b1592e830d1a774"
diff --git a/poseidon2/io.nim b/poseidon2/io.nim
index 68d7157..4ca3f30 100644
--- a/poseidon2/io.nim
+++ b/poseidon2/io.nim
@@ -2,10 +2,10 @@ import std/options
 import constantine/math/arithmetic
 import constantine/math/io/io_bigints
 import constantine/math/io/io_fields
-import constantine/math/config/curves
+import constantine/named/algebras
 import ./types
 
-export curves
+export algebras
 
 func fromOpenArray(_: type F, bytes: openArray[byte]): F =
   F.fromBig(B.unmarshal(bytes, littleEndian))
@@ -19,7 +19,7 @@ func fromBytes*(_: type F, bytes: array[32, byte]): Option[F] =
   ## Converts bytes into a field element. The byte array is interpreted as a
   ## canonical little-endian big integer.
   let big = B.unmarshal(bytes, littleEndian)
-  if bool(big < F.fieldMod()):
+  if bool(big < F.getModulus()):
     return some(F.fromBig(big))
 
 func toBytes*(element: F): array[32, byte] =
diff --git a/poseidon2/roundfun.nim b/poseidon2/roundfun.nim
index 7e9d5a0..dc087aa 100644
--- a/poseidon2/roundfun.nim
+++ b/poseidon2/roundfun.nim
@@ -1,6 +1,6 @@
 import
   constantine/math/arithmetic,
-  constantine/math/config/curves
+  constantine/named/algebras
 
 import ./types
 import ./roundconst
diff --git a/poseidon2/types.nim b/poseidon2/types.nim
index 2c9fa52..98d567d 100644
--- a/poseidon2/types.nim
+++ b/poseidon2/types.nim
@@ -3,12 +3,12 @@ import
   constantine/math/arithmetic,
   constantine/math/io/io_fields,
   constantine/math/io/io_bigints,
-  constantine/math/config/curves
+  constantine/named/algebras
 
 #-------------------------------------------------------------------------------
 
 type B* = BigInt[254]
-type F* = Fr[BN254Snarks]
+type F* = Fr[BN254_Snarks]
 type S* = (F,F,F)
 
 #-------------------------------------------------------------------------------