diff --git a/grammar.js b/grammar.js
index 40d701976..7bebd2fe8 100644
--- a/grammar.js
+++ b/grammar.js
@@ -104,6 +104,7 @@ module.exports = grammar({
         $.module_abbrev,
         $.import_decl,
         $.compiler_directive_decl,
+        $.fsi_directive_decl,
         $.type_definition,
         // $.exception_defn
       ),
@@ -137,6 +138,13 @@ module.exports = grammar({
         repeat($.string),
       ),
 
+
+    fsi_directive_decl: $ =>
+      choice(
+        seq("#r", repeat($.string)),
+        seq("#load", repeat($.string)),
+      ),
+
     import_decl: $ =>
       seq(
         "open",
diff --git a/queries/highlights.scm b/queries/highlights.scm
new file mode 100644
index 000000000..68b70ba7d
--- /dev/null
+++ b/queries/highlights.scm
@@ -0,0 +1,196 @@
+;; ----------------------------------------------------------------------------
+;; Literals and comments
+
+[
+  (line_comment)
+  (block_comment)
+  (block_comment_content)
+] @comment
+
+
+;; ----------------------------------------------------------------------------
+;; Punctuation
+
+[
+  "("
+  ")"
+  "{"
+  "}"
+  "["
+  "]"
+  "[|"
+  "|]"
+  "[<"
+  ">]"
+] @punctuation.bracket
+
+[
+  "," 
+  ";"
+] @punctuation.delimiter
+
+[
+  "|" 
+  "="
+  ">"
+  "<"
+  "-"
+  "~"
+  (infix_op)
+  (prefix_op)
+  (symbolic_op)
+] @operator
+
+
+
+(attribute) @attribute
+
+[
+  "if"
+  "then"
+  "else"
+  "elif"
+  "when"
+  "match"
+  "match!"
+  "and"
+  "or"
+  "&&"
+  "||"
+  "then"
+] @keyword.control.conditional
+
+[
+  "return"
+  "return!"
+] @keyword.control.return
+
+[
+  "for"
+  "while"
+] @keyword.control.return
+
+
+[
+  "open"
+  "#r"
+  "#load"
+] @keyword.control.import
+
+[
+  "abstract"
+  "delegate"
+  "static"
+  "inline"
+  "internal"
+  "mutable"
+  "override"
+  "private"
+  "public"
+  "rec"
+] @keyword.storage.modifier
+
+[
+  "enum"
+  "let"
+  "let!"
+  "member"
+  "module"
+  "namespace"
+  "type"
+] @keyword.storage
+
+[
+  "as"
+  "assert"
+  "begin"
+  "default"
+  "do"
+  "do!"
+  "done"
+  "downcast"
+  "downto"
+  "end"
+  "event"
+  "field"
+  "finally"
+  "fun"
+  "function"
+  "get"
+  "global"
+  "inherit"
+  "interface"
+  "lazy"
+  "new"
+  "not"
+  "null"
+  "of"
+  "param"
+  "property"
+  "set"
+  "struct"
+  "try"
+  "upcast"
+  "use"
+  "use!"
+  "val"
+  "with"
+  "yield"
+  "yield!"
+] @keyword
+
+[
+ "true"
+ "false"
+ "unit"
+ ] @constant.builtin
+
+[
+ (type)
+ (const)
+] @constant
+
+[
+ (union_type_case)
+ (rules (rule (identifier_pattern)))
+] @type.enum
+
+(fsi_directive_decl (string) @namespace)
+
+[
+  (import_decl (long_identifier))
+  (named_module (long_identifier))  
+  (namespace (long_identifier))  
+  (named_module 
+    name: (long_identifier) )
+  (namespace 
+    name: (long_identifier) )
+] @namespace
+
+
+(dot_expression
+  base: (long_identifier_or_op) @variable.other.member
+  field: (long_identifier_or_op) @function)
+
+[
+ ;;(value_declaration_left (identifier_pattern) ) 
+ (function_declaration_left (identifier) ) 
+ (call_expression (long_identifier_or_op (long_identifier)))
+ ;;(application_expression (long_identifier_or_op (long_identifier)))
+] @function
+
+[
+  (string)
+  (triple_quoted_string)
+] @string
+
+[
+  (int)
+  (int16)
+  (int32)
+  (int64)
+  (float)
+  (decimal)
+] @constant.numeric
+
+
diff --git a/src/grammar.json b/src/grammar.json
index d4e8d26bc..1a2b084d4 100644
--- a/src/grammar.json
+++ b/src/grammar.json
@@ -113,6 +113,10 @@
           "type": "SYMBOL",
           "name": "compiler_directive_decl"
         },
+        {
+          "type": "SYMBOL",
+          "name": "fsi_directive_decl"
+        },
         {
           "type": "SYMBOL",
           "name": "type_definition"
@@ -224,6 +228,43 @@
         }
       ]
     },
+    "fsi_directive_decl": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "#r"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SYMBOL",
+                "name": "string"
+              }
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "#load"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SYMBOL",
+                "name": "string"
+              }
+            }
+          ]
+        }
+      ]
+    },
     "import_decl": {
       "type": "SEQ",
       "members": [
diff --git a/src/node-types.json b/src/node-types.json
index db0ddd303..566e97d23 100644
--- a/src/node-types.json
+++ b/src/node-types.json
@@ -141,6 +141,10 @@
         "type": "compiler_directive_decl",
         "named": true
       },
+      {
+        "type": "fsi_directive_decl",
+        "named": true
+      },
       {
         "type": "import_decl",
         "named": true
@@ -1414,6 +1418,21 @@
       ]
     }
   },
+  {
+    "type": "fsi_directive_decl",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "string",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "fun_expression",
     "named": true,
@@ -3278,10 +3297,18 @@
     "type": "#",
     "named": false
   },
+  {
+    "type": "#load",
+    "named": false
+  },
   {
     "type": "#nowarn",
     "named": false
   },
+  {
+    "type": "#r",
+    "named": false
+  },
   {
     "type": "$",
     "named": false
diff --git a/corpus/attributes.txt b/test/corpus/attributes.txt
similarity index 100%
rename from corpus/attributes.txt
rename to test/corpus/attributes.txt
diff --git a/corpus/comments.txt b/test/corpus/comments.txt
similarity index 100%
rename from corpus/comments.txt
rename to test/corpus/comments.txt
diff --git a/corpus/compiler_directive.txt b/test/corpus/compiler_directive.txt
similarity index 100%
rename from corpus/compiler_directive.txt
rename to test/corpus/compiler_directive.txt
diff --git a/corpus/constants.txt b/test/corpus/constants.txt
similarity index 100%
rename from corpus/constants.txt
rename to test/corpus/constants.txt
diff --git a/corpus/expr.txt b/test/corpus/expr.txt
similarity index 100%
rename from corpus/expr.txt
rename to test/corpus/expr.txt
diff --git a/test/corpus/fsi_directives.txt b/test/corpus/fsi_directives.txt
new file mode 100644
index 000000000..60b654f41
--- /dev/null
+++ b/test/corpus/fsi_directives.txt
@@ -0,0 +1,37 @@
+===
+refer dll 
+===
+
+#r "path/to/MyAssembly.dll"
+
+---
+
+(file
+  (fsi_directive_decl
+    (string)))
+
+===
+refer nuget package 
+===
+
+#r "path/to/MyAssembly.dll"
+
+---
+
+(file
+  (fsi_directive_decl
+    (string)))
+
+===
+load script 
+===
+
+#load "Script1.fsx"
+
+---
+
+(file
+  (fsi_directive_decl
+    (string)))
+
+
diff --git a/corpus/function_defn.txt b/test/corpus/function_defn.txt
similarity index 100%
rename from corpus/function_defn.txt
rename to test/corpus/function_defn.txt
diff --git a/corpus/identifiers.txt b/test/corpus/identifiers.txt
similarity index 100%
rename from corpus/identifiers.txt
rename to test/corpus/identifiers.txt
diff --git a/corpus/import.txt b/test/corpus/import.txt
similarity index 100%
rename from corpus/import.txt
rename to test/corpus/import.txt
diff --git a/corpus/module.txt b/test/corpus/module.txt
similarity index 100%
rename from corpus/module.txt
rename to test/corpus/module.txt
diff --git a/corpus/module_abbrev.txt b/test/corpus/module_abbrev.txt
similarity index 100%
rename from corpus/module_abbrev.txt
rename to test/corpus/module_abbrev.txt
diff --git a/corpus/patterns.txt b/test/corpus/patterns.txt
similarity index 100%
rename from corpus/patterns.txt
rename to test/corpus/patterns.txt
diff --git a/corpus/source_file.txt b/test/corpus/source_file.txt
similarity index 100%
rename from corpus/source_file.txt
rename to test/corpus/source_file.txt
diff --git a/corpus/type_defn.txt b/test/corpus/type_defn.txt
similarity index 100%
rename from corpus/type_defn.txt
rename to test/corpus/type_defn.txt
diff --git a/test/highlight/fsi_directives.fsx b/test/highlight/fsi_directives.fsx
new file mode 100644
index 000000000..57691b34a
--- /dev/null
+++ b/test/highlight/fsi_directives.fsx
@@ -0,0 +1,10 @@
+#r "nuget: FSharp.Compiler.Service, 43.7.300"
+//<- keyword.control.import
+// ^ namespace
+#r "/home/bin/MyApp.dll"
+//<- keyword.control.import
+// ^ namespace
+#load "Strings.fsx"
+//<- keyword.control.import
+//    ^ namespace
+