diff --git a/src/compiler/compiler.ts b/src/compiler/compiler.ts
index f1c1e01..227cc8b 100644
--- a/src/compiler/compiler.ts
+++ b/src/compiler/compiler.ts
@@ -220,6 +220,9 @@ export class Compiler {
           case '/':
             instructions.push(['DIV'])
             break
+          case '%':
+            instructions.push(['MOD'])
+            break
           default:
             throw new CompilerError(`Unsupported binary operator: ${opValue}`, op.from, op.to)
         }
diff --git a/src/compiler/tests/compiler.test.ts b/src/compiler/tests/compiler.test.ts
index 46ee0b7..5e58c11 100644
--- a/src/compiler/tests/compiler.test.ts
+++ b/src/compiler/tests/compiler.test.ts
@@ -38,6 +38,12 @@ describe('compiler', () => {
     expect('15 / 3').toEvaluateTo(5)
   })
 
+  test('modulo', () => {
+    expect('44 % 2').toEvaluateTo(0)
+    expect('44 % 3').toEvaluateTo(2)
+    expect('3 % 4').toEvaluateTo(3)
+  })
+
   test('assign number', () => {
     expect('x = 5').toEvaluateTo(5)
   })
diff --git a/src/parser/operatorTokenizer.ts b/src/parser/operatorTokenizer.ts
index 478c20d..d15318c 100644
--- a/src/parser/operatorTokenizer.ts
+++ b/src/parser/operatorTokenizer.ts
@@ -17,6 +17,7 @@ const operators: Array<Operator> = [
   { str: '-', tokenName: 'Minus' },
   { str: '>', tokenName: 'Gt' },
   { str: '<', tokenName: 'Lt' },
+  { str: '%', tokenName: 'Modulo' },
 ]
 
 export const operatorTokenizer = new ExternalTokenizer((input: InputStream) => {
diff --git a/src/parser/shrimp.grammar b/src/parser/shrimp.grammar
index ee89d1c..9147110 100644
--- a/src/parser/shrimp.grammar
+++ b/src/parser/shrimp.grammar
@@ -6,7 +6,7 @@
 
 @top Program { item* }
 
-@external tokens operatorTokenizer from "./operatorTokenizer" { Star, Slash, Plus, Minus, And, Or, Eq, Neq, Lt, Lte, Gt, Gte }
+@external tokens operatorTokenizer from "./operatorTokenizer" { Star, Slash, Plus, Minus, And, Or, Eq, Neq, Lt, Lte, Gt, Gte, Modulo }
 
 @tokens {
   @precedence { Number Regex }
@@ -148,6 +148,7 @@ Assign {
 }
 
 BinOp {
+  expression !multiplicative Modulo expression |
   (expression | BinOp) !multiplicative Star (expression | BinOp) |
   (expression | BinOp) !multiplicative Slash (expression | BinOp) |
   (expression | BinOp) !additive Plus (expression | BinOp) |
diff --git a/src/parser/shrimp.terms.ts b/src/parser/shrimp.terms.ts
index 69d6d47..eb818df 100644
--- a/src/parser/shrimp.terms.ts
+++ b/src/parser/shrimp.terms.ts
@@ -12,40 +12,41 @@ export const
   Lte = 10,
   Gt = 11,
   Gte = 12,
-  Identifier = 13,
-  AssignableIdentifier = 14,
-  Word = 15,
-  IdentifierBeforeDot = 16,
-  Do = 17,
-  Program = 18,
-  PipeExpr = 19,
-  FunctionCall = 20,
-  DotGet = 21,
-  Number = 22,
-  ParenExpr = 23,
-  FunctionCallOrIdentifier = 24,
-  BinOp = 25,
-  String = 26,
-  StringFragment = 27,
-  Interpolation = 28,
-  EscapeSeq = 29,
-  Boolean = 30,
-  Regex = 31,
-  Dict = 32,
-  NamedArg = 33,
-  NamedArgPrefix = 34,
-  FunctionDef = 35,
-  Params = 36,
-  colon = 37,
-  keyword = 52,
-  Underscore = 39,
-  Array = 40,
-  Null = 41,
-  ConditionalOp = 42,
-  PositionalArg = 43,
-  IfExpr = 45,
-  SingleLineThenBlock = 47,
-  ThenBlock = 48,
-  ElseIfExpr = 49,
-  ElseExpr = 51,
-  Assign = 53
+  Modulo = 13,
+  Identifier = 14,
+  AssignableIdentifier = 15,
+  Word = 16,
+  IdentifierBeforeDot = 17,
+  Do = 18,
+  Program = 19,
+  PipeExpr = 20,
+  FunctionCall = 21,
+  DotGet = 22,
+  Number = 23,
+  ParenExpr = 24,
+  FunctionCallOrIdentifier = 25,
+  BinOp = 26,
+  String = 27,
+  StringFragment = 28,
+  Interpolation = 29,
+  EscapeSeq = 30,
+  Boolean = 31,
+  Regex = 32,
+  Dict = 33,
+  NamedArg = 34,
+  NamedArgPrefix = 35,
+  FunctionDef = 36,
+  Params = 37,
+  colon = 38,
+  keyword = 53,
+  Underscore = 40,
+  Array = 41,
+  Null = 42,
+  ConditionalOp = 43,
+  PositionalArg = 44,
+  IfExpr = 46,
+  SingleLineThenBlock = 48,
+  ThenBlock = 49,
+  ElseIfExpr = 50,
+  ElseExpr = 52,
+  Assign = 54
diff --git a/src/parser/shrimp.ts b/src/parser/shrimp.ts
index 4865cb6..5b4e228 100644
--- a/src/parser/shrimp.ts
+++ b/src/parser/shrimp.ts
@@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./scopeTracker"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,end:76, null:82, if:92, elseif:100, else:104}
+const spec_Identifier = {__proto__:null,end:78, null:84, if:94, elseif:102, else:106}
 export const parser = LRParser.deserialize({
   version: 14,
-  states: "2YQYQbOOO!ZOpO'#CqO#mQcO'#CtO$gOSO'#CvO$uQbO'#ETOOQ`'#DP'#DPOOQa'#C|'#C|O%xQbO'#DUO&}QcO'#DxOOQa'#Dx'#DxO(TQcO'#DwO(lQRO'#CuO(zQcO'#DsO)cQbO'#CsOOQ`'#Dt'#DtO*ZQbO'#DsO*iQbO'#EZOOQ`'#DZ'#DZO+^QRO'#DcOOQ`'#Ds'#DsO+cQQO'#DrOOQ`'#Dr'#DrOOQ`'#Dd'#DdQYQbOOO+kObO,59]O+sQbO'#C}OOQa'#Dw'#DwOOQ`'#DX'#DXOOQ`'#EY'#EYOOQ`'#Dk'#DkO+}QbO,59[O,bQbO'#CxO,jQWO'#CyOOOO'#Dz'#DzOOOO'#De'#DeO-OOSO,59bOOQa,59b,59bOOQ`'#Dg'#DgO-^QbO'#DQO-fQQO,5:oOOQ`'#Df'#DfO-kQbO,59pO-rQQO,59hOOQa,59p,59pO-}QbO,59pO*iQbO,59aO*iQbO,59aO.XQRO,59_O/nQRO'#CuO0OQRO,59_O0[QQO,59_O0aQQO,59_O0iQbO'#DlO0tQbO,59ZO1VQRO,5:uO1^QQO,5:uO1cQbO,59}OOQ`,5:^,5:^OOQ`-E7b-E7bOOQa1G.w1G.wOOQ`,59i,59iOOQ`-E7i-E7iOOOO,59d,59dOOOO,59e,59eOOOO-E7c-E7cOOQa1G.|1G.|OOQ`-E7e-E7eO1mQbO1G0ZOOQ`-E7d-E7dO1zQQO1G/SOOQa1G/[1G/[O2VQbO1G/[OOQO'#Di'#DiO1zQQO1G/SOOQa1G/S1G/SOOQ`'#Dj'#DjO2VQbO1G/[OOQa1G.{1G.{O2aQcO1G.{OOQa1G.y1G.yO*iQbO,59rO*iQbO,59rO!`QbO'#CtO&PQbO'#CpOOQ`,5:W,5:WOOQ`-E7j-E7jO2{QbO1G0aOOQ`1G/i1G/iO3YQbO7+%uO3_QbO7+%vO3oQQO7+$nOOQa7+$n7+$nO3zQbO7+$vOOQa7+$v7+$vOOQO-E7g-E7gOOQ`-E7h-E7hOOQO1G/^1G/^O4UQRO1G/^OOQ`'#D]'#D]O4`QbO7+%{O4eQbO7+%|OOQ`<<Ia<<IaOOQ`'#Dh'#DhO4{QQO'#DhO5QQbO'#EVO5hQbO<<IbOOQa<<HY<<HYOOQa<<Hb<<HbOOQ`<<Ig<<IgOOQ`'#D^'#D^O5mQbO<<IhOOQ`,5:S,5:SOOQ`-E7f-E7fOOQ`AN>|AN>|O*iQbO'#D_OOQ`'#Dm'#DmO5xQbOAN?SO6TQQO'#DaOOQ`AN?SAN?SO6YQbOAN?SO6_QRO,59yO6fQQO,59yOOQ`-E7k-E7kOOQ`G24nG24nO6kQbOG24nO6pQQO,59{O6uQQO1G/eOOQ`LD*YLD*YO3_QbO1G/gO4eQbO7+%POOQ`7+%R7+%ROOQ`<<Hk<<Hk",
-  stateData: "6}~O!dOS!eOS~O]QO^bO_XO`POaSOfXOnXOoXOyXO!O`O!j]O!mRO!tUO!uVO!veO~O!ihO~O]jO_XO`POaSOfXOnXOoXOriOwkOyXO!j]O!mRO!tUO!uVO|hX!vhX#PhX!{hXvhX~OP!kXQ!kXR!kXS!kXT!kXU!kXV!kXW!kXX!kXY!kXZ!kX[!kX~P!`OkqO!mtO!ooO!ppO~O]uOutP~O]jO_XO`POfXOnXOoXOriOyXO!j]O!mRO!tUO!uVO!vxO~O!z{O~P$}O]jO_XO`POaSOfXOnXOoXOriOwkOyXO!j]O!mRO!tUO!uVO~OP!lXQ!lXR!lXS!lX!v!lX#P!lXT!lXU!lXV!lXW!lXX!lXY!lXZ!lX[!lX!{!lXv!lX~P&POP!kXQ!kXR!kXS!kX!v!gX#P!gXv!gX~OP}OQ}OR!OOS!OO~OP}OQ}OR!OOS!OO!v!gX#P!gXv!gX~O]QO_XO`POaSOfXOnXOoXOyXO!j]O!mRO!tUO!uVO~O|!UO!v!gX#P!gXv!gX~O]jO_XO`POfXOnXOoXOyXO!j]O!mRO!tUO!uVO~OV!YO~O!v!ZO#P!ZO~O]!]Of!]O~OaSOw!^O~P*iO|da!vda#Pda!{davda~P&PO]!`O!j]O~O!m!aO!o!aO!p!aO!q!aO!r!aO!s!aO~OkqO!m!cO!ooO!ppO~O]uOutX~Ou!eO~O!z!hO~P$}OriO!v!jO!z!lO~O!v!mO!z!hO~P*iO!{!qOP!kXQ!kXR!kXS!kXT!kXU!kXV!kXW!kXX!kXY!kXZ!kX[!kX~OT!sOU!sOV!rOW!rOX!rOY!rOZ!rO[!rO~OP}OQ}OR!OOS!OO~P/SOP}OQ}OR!OOS!OO!{!qO~O|!UO!{!qO~O]!tO`PO!j]O~O|!UO!vca#Pca!{cavca~Ou!xO~P/SOu!xO~O^bO!O`O~P)cO^bO!O`O!v!{O~P)cOriO!v!jO!z!}O~O!v!mO!z#PO~P*iOP}OQ}ORiiSii!vii#Pii!{iivii~O^bO!O`O!v#WO~P)cOv#XO~O^bO!O`O!v#YOv!yP~P)cOriO!v!jO!z#^O~O!v!mO!z#_O~P*iO!{ziuzi~P/SOv#`O~O^bO!O`O!v#YOv!yP!S!yP!U!yP~P)cO!v#cO~O^bO!O`O!v#YOv!yX!S!yX!U!yX~P)cOv#eO~Ov#jO!S#fO!U#iO~Ov#oO!S#fO!U#iO~Ou#qO~Ov#oO~Ou#rO~P/SOu#rO~Ov#sO~O!v#tO~O!v#uO~Ofo~",
-  goto: ".]#PPPPPPPPPPPPPPPPPPPP#Q#a#oP$e#a%^%sP&d&dPP%s&hP&{'fPPP%sP'i'uP'|P(Y(](fP(jP'|(p(v(|)S)Y)c)m)w*Q*XPPPP*_*c*wPP+Z,dP-XPPPPPPPP-]-]-pPP-x.P.PdcOg!Y!e!x!{#W#[#t#uR!S]i^O]g!U!Y!e!x!{#W#[#t#ufQO]g!Y!e!x!{#W#[#t#utjQVW`iny|}!O!i!n!r!s!t!u#O#fR!t!UfWO]g!Y!e!x!{#W#[#t#utXQVW`iny|}!O!i!n!r!s!t!u#O#fQ!`oR!u!Ud[Og!Y!e!x!{#W#[#t#uQ!R]Q!o}R!p!O!]XOQVW]`giny|}!O!Y!e!i!n!r!s!t!u!x!{#O#W#[#f#t#uTqRsYlQWn!t!uQzVQ!gyX!jz!g!k!|dcOg!Y!e!x!{#W#[#t#uYkQWn!t!uQ!S]R!^iRwSQ!S]Q!X`Q#S!sR#m#fZlQWn!t!uecOg!Y!e!x!{#W#[#t#uR#V!xQ#b#WQ#v#tR#w#uT#g#b#hQ#k#bR#p#hQgOR![gQsRR!bsQyVR!fyQvSR!dvW#[!{#W#t#uR#d#[Q!kzQ!|!gT#Q!k!|Q!n|Q#O!iT#R!n#OWnQW!t!uR!_nS!V_!TR!w!VQ#h#bR#n#hTfOgSdOgQ!y!YQ!z!eQ#U!xZ#Z!{#W#[#t#ud_Og!Y!e!x!{#W#[#t#uQ!T]R!v!UdZOg!Y!e!x!{#W#[#t#uYkQWn!t!uQ|VQ!Q]Q!W`Q!^iQ!iyW!m|!i!n#OQ!o}Q!p!OQ#S!rQ#T!sR#l#fdYOg!Y!e!x!{#W#[#t#utjQVW`iny|}!O!i!n!r!s!t!u#O#fR!P]TrRssTOQW]gin!Y!e!t!u!x!{#W#[#t#uQ#]!{V#a#W#t#uZmQWn!t!ueaOg!Y!e!x!{#W#[#t#u",
-  nodeNames: "⚠ Star Slash Plus Minus And Or Eq Neq Lt Lte Gt Gte Identifier AssignableIdentifier Word IdentifierBeforeDot Do Program PipeExpr FunctionCall DotGet Number ParenExpr FunctionCallOrIdentifier BinOp String StringFragment Interpolation EscapeSeq Boolean Regex Dict NamedArg NamedArgPrefix FunctionDef Params colon keyword Underscore Array Null ConditionalOp PositionalArg operator IfExpr keyword SingleLineThenBlock ThenBlock ElseIfExpr keyword ElseExpr keyword Assign",
-  maxTerm: 93,
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-  tokenPrec: 1008
+  tokenData: "AO~R|OX#{XY$jYZ%TZp#{pq$jqs#{st%ntu'Vuw#{wx'[xy'ayz'zz{#{{|(e|}#{}!O(e!O!P#{!P!Q+X!Q![)S![!]3t!]!^%T!^!}#{!}#O4_#O#P6T#P#Q6Y#Q#R#{#R#S6s#S#T#{#T#Y7^#Y#Z8l#Z#b7^#b#c<z#c#f7^#f#g=q#g#h7^#h#i>h#i#o7^#o#p#{#p#q@`#q;'S#{;'S;=`$d<%l~#{~O#{~~@yS$QUlSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{S$gP;=`<%l#{^$qUlS!eYOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U%[UlS!wQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^%uZlS!fYOY%nYZ#{Zt%ntu&huw%nwx&hx#O%n#O#P&h#P;'S%n;'S;=`'P<%lO%nY&mS!fYOY&hZ;'S&h;'S;=`&y<%lO&hY&|P;=`<%l&h^'SP;=`<%l%n~'[O!p~~'aO!n~U'hUlS!kQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(RUlS!|QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(jWlSOt#{uw#{x!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U)ZYlSgQOt#{uw#{x!O#{!O!P)y!P!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U*OWlSOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U*oWlSgQOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U+^WlSOt#{uw#{x!P#{!P!Q+v!Q#O#{#P;'S#{;'S;=`$d<%lO#{U+{^lSOY,wYZ#{Zt,wtu-zuw,wwx-zx!P,w!P!Q#{!Q!},w!}#O2m#O#P0Y#P;'S,w;'S;=`3n<%lO,wU-O^lSpQOY,wYZ#{Zt,wtu-zuw,wwx-zx!P,w!P!Q0o!Q!},w!}#O2m#O#P0Y#P;'S,w;'S;=`3n<%lO,wQ.PXpQOY-zZ!P-z!P!Q.l!Q!}-z!}#O/Z#O#P0Y#P;'S-z;'S;=`0i<%lO-zQ.oP!P!Q.rQ.wUpQ#Z#[.r#]#^.r#a#b.r#g#h.r#i#j.r#m#n.rQ/^VOY/ZZ#O/Z#O#P/s#P#Q-z#Q;'S/Z;'S;=`0S<%lO/ZQ/vSOY/ZZ;'S/Z;'S;=`0S<%lO/ZQ0VP;=`<%l/ZQ0]SOY-zZ;'S-z;'S;=`0i<%lO-zQ0lP;=`<%l-zU0tWlSOt#{uw#{x!P#{!P!Q1^!Q#O#{#P;'S#{;'S;=`$d<%lO#{U1eblSpQOt#{uw#{x#O#{#P#Z#{#Z#[1^#[#]#{#]#^1^#^#a#{#a#b1^#b#g#{#g#h1^#h#i#{#i#j1^#j#m#{#m#n1^#n;'S#{;'S;=`$d<%lO#{U2r[lSOY2mYZ#{Zt2mtu/Zuw2mwx/Zx#O2m#O#P/s#P#Q,w#Q;'S2m;'S;=`3h<%lO2mU3kP;=`<%l2mU3qP;=`<%l,wU3{UlSvQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U4fW!vQlSOt#{uw#{x!_#{!_!`5O!`#O#{#P;'S#{;'S;=`$d<%lO#{U5TVlSOt#{uw#{x#O#{#P#Q5j#Q;'S#{;'S;=`$d<%lO#{U5qU!uQlSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~6YO!q~U6aU!{QlSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U6zUlSxQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U7cYlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#o7^#o;'S#{;'S;=`$d<%lO#{U8YUsQlSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U8qZlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#U9d#U#o7^#o;'S#{;'S;=`$d<%lO#{U9i[lSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#`7^#`#a:_#a#o7^#o;'S#{;'S;=`$d<%lO#{U:d[lSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#g7^#g#h;Y#h#o7^#o;'S#{;'S;=`$d<%lO#{U;_[lSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#X7^#X#Y<T#Y#o7^#o;'S#{;'S;=`$d<%lO#{U<[YoQlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#o7^#o;'S#{;'S;=`$d<%lO#{^=RY!rWlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#o7^#o;'S#{;'S;=`$d<%lO#{^=xY!tWlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#o7^#o;'S#{;'S;=`$d<%lO#{^>o[!sWlSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#f7^#f#g?e#g#o7^#o;'S#{;'S;=`$d<%lO#{U?j[lSOt#{uw#{x!_#{!_!`8R!`#O#{#P#T#{#T#i7^#i#j;Y#j#o7^#o;'S#{;'S;=`$d<%lO#{U@gU}QlSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~AOO#Q~",
+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!j~~", 11)],
+  topRules: {"Program":[0,19]},
+  specialized: [{term: 14, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 14, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
+  tokenPrec: 1069
 })
diff --git a/src/parser/tests/basics.test.ts b/src/parser/tests/basics.test.ts
index 0d870a8..f5e03f2 100644
--- a/src/parser/tests/basics.test.ts
+++ b/src/parser/tests/basics.test.ts
@@ -408,6 +408,15 @@ describe('BinOp', () => {
     `)
   })
 
+  test('modulo tests', () => {
+    expect('4 % 3').toMatchTree(`
+      BinOp
+        Number 4
+        Modulo %
+        Number 3
+    `)
+  })
+
   test('mixed operations with precedence', () => {
     expect('2 + 3 * 4 - 5 / 1').toMatchTree(`
       BinOp