diff --git a/src/_string_tools/slice_field.nr b/src/_string_tools/slice_field.nr
index 44e8f96..6b8c7e9 100644
--- a/src/_string_tools/slice_field.nr
+++ b/src/_string_tools/slice_field.nr
@@ -3,7 +3,7 @@ global PHI: Field = 0x30644E72E131A029B85045B68181585D;
 
 global PLO_200_felt: Field = 0x29B85045B68181585D2833E84879B9709143E1F593F0000001;
 global PHI_54_felt: Field = 0x30644E72E131A0;
-global TWO_POW_200 = 0x100000000000000000000000000000000000000000000000000;
+global TWO_POW_200: Field = 0x100000000000000000000000000000000000000000000000000;
 struct Slice200 {
     hihi: u64, // 7 bytes
     hilo: u64, // 7 bytes
diff --git a/src/_string_tools/slice_packed_field.nr b/src/_string_tools/slice_packed_field.nr
index 5d4a1a2..5751e45 100644
--- a/src/_string_tools/slice_packed_field.nr
+++ b/src/_string_tools/slice_packed_field.nr
@@ -5,10 +5,10 @@
 // #############################################################
 // ### GLOBAL VARIABLES AND LOOKUP TABLES
 // #############################################################
-global two_pow_128 = 0x100000000000000000000000000000000;
-global two_pow_64 = 0x10000000000000000;
-global two_pow_32 = 0x100000000;
-global two_pow_16 = 0x10000;
+global two_pow_128: Field = 0x100000000000000000000000000000000;
+global two_pow_64: Field = 0x10000000000000000;
+global two_pow_32: Field = 0x100000000;
+global two_pow_16: Field = 0x10000;
 
 global path_multipliers_chunk4: [Field; 32] = [
     /* 0  (00000) */ 0,
diff --git a/src/_table_generation/make_tables.nr b/src/_table_generation/make_tables.nr
index 9d19e4f..553884e 100644
--- a/src/_table_generation/make_tables.nr
+++ b/src/_table_generation/make_tables.nr
@@ -1,11 +1,11 @@
 //! Contains methods used to generate tables in `json_tables.nr`. These table generation methods shouldn't be used inside of actual circuits.
 
 mod CaptureMode {
-    global GRAMMAR_CAPTURE = 0;
-    global STRING_CAPTURE = 1;
-    global NUMERIC_CAPTURE = 2;
-    global LITERAL_CAPTURE = 3;
-    global ERROR_CAPTURE = 4;
+    global GRAMMAR_CAPTURE: Field = 0;
+    global STRING_CAPTURE: Field = 1;
+    global NUMERIC_CAPTURE: Field = 2;
+    global LITERAL_CAPTURE: Field = 3;
+    global ERROR_CAPTURE: Field = 4;
 }
 use crate::_table_generation::make_tables::CaptureMode::STRING_CAPTURE;
 use crate::_table_generation::make_tables_subtables::{
diff --git a/src/enums.nr b/src/enums.nr
index 7d5c2aa..29b4ab1 100644
--- a/src/enums.nr
+++ b/src/enums.nr
@@ -1,29 +1,29 @@
 mod ScanMode {
-    global GRAMMAR_SCAN = 0;
-    global STRING_SCAN = 1;
-    global NUMERIC_SCAN = 2;
+    global GRAMMAR_SCAN: Field  = 0;
+    global STRING_SCAN: Field =    1;
+    global NUMERIC_SCAN: Field = 2;
     global LITERAL_SCAN: Field = 3;
 }
 
 mod Token {
-    global NO_TOKEN = 0;
-    global BEGIN_OBJECT_TOKEN = 1;
-    global END_OBJECT_TOKEN = 2;
-    global BEGIN_ARRAY_TOKEN = 3;
+    global NO_TOKEN: Field = 0;
+    global BEGIN_OBJECT_TOKEN: Field = 1;
+    global END_OBJECT_TOKEN: Field = 2;
+    global BEGIN_ARRAY_TOKEN: Field = 3;
     global END_ARRAY_TOKEN: Field = 4;
-    global KEY_SEPARATOR_TOKEN = 5;
-    global VALUE_SEPARATOR_TOKEN = 6;
-    global STRING_TOKEN = 7;
-    global NUMERIC_TOKEN = 8;
-    global LITERAL_TOKEN = 9;
-    global KEY_TOKEN = 10;
-    global NUM_TOKENS = 11;
-    global NUM_TOKENS_MUL_2 = 22;
+    global KEY_SEPARATOR_TOKEN: Field = 5;
+    global VALUE_SEPARATOR_TOKEN: Field = 6;
+    global STRING_TOKEN: Field = 7;
+    global NUMERIC_TOKEN: Field = 8;
+    global LITERAL_TOKEN: Field = 9;
+    global KEY_TOKEN: Field = 10;
+    global NUM_TOKENS: u32 = 11;
+    global NUM_TOKENS_MUL_2: u32 = 22;
 }
 
 mod Layer {
-    global OBJECT_LAYER = 0;
-    global ARRAY_LAYER = 1;
-    global SINGLE_VALUE_LAYER = 2;
+    global OBJECT_LAYER: Field  = 0;
+    global ARRAY_LAYER: Field = 1;
+    global SINGLE_VALUE_LAYER: Field = 2;
 }
 
diff --git a/src/get_literal.nr b/src/get_literal.nr
index eec7cda..dd173f1 100644
--- a/src/get_literal.nr
+++ b/src/get_literal.nr
@@ -5,7 +5,7 @@ use crate::getters::JSONValue;
 use crate::json::JSON;
 use crate::json_entry::JSONEntry;
 
-global MAX_LITERAL_LENGTH_AS_STRING = 5;
+global MAX_LITERAL_LENGTH_AS_STRING : u32= 5;
 global LITERAL_OFFSET_SHIFT: [Field; 6] =
     [0x10000000000, 0x100000000, 0x1000000, 0x10000, 0x100, 1];
 
diff --git a/src/get_number.nr b/src/get_number.nr
index ea10bd2..be5a6f0 100644
--- a/src/get_number.nr
+++ b/src/get_number.nr
@@ -6,7 +6,7 @@ use crate::json::JSON;
 use crate::json_entry::JSONEntry;
 use crate::json_tables::ASCII_TO_NUMBER;
 
-global U64_LENGTH_AS_BASE10_STRING = 20;
+global U64_LENGTH_AS_BASE10_STRING: u32 = 20;
 global NUMBER_OFFSET_SHIFT: [Field; 21] = [
     100000000000000000000,
     10000000000000000000,