diff --git a/bin/tsserver.js b/bin/tsserver.js
index 040eac2ef75..d4ff3ea8a2b 100644
--- a/bin/tsserver.js
+++ b/bin/tsserver.js
@@ -31502,6 +31502,12 @@ var ts;
                     var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
                     setSourceFileFields(newSourceFile, scriptSnapshot, version);
                     newSourceFile.nameTable = undefined;
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
                     return newSourceFile;
                 }
             }
diff --git a/bin/typescript.d.ts b/bin/typescript.d.ts
index 11169b6fa28..f560e5958cf 100644
--- a/bin/typescript.d.ts
+++ b/bin/typescript.d.ts
@@ -1375,6 +1375,8 @@ declare module "typescript" {
          * not happen and the entire document will be re - parsed.
          */
         getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
+        /** Releases all resources held by this script snapshot */
+        dispose?(): void;
     }
     module ScriptSnapshot {
         function fromString(text: string): IScriptSnapshot;
diff --git a/bin/typescript.js b/bin/typescript.js
index c2f23126ea8..a3b921d2341 100644
--- a/bin/typescript.js
+++ b/bin/typescript.js
@@ -36867,6 +36867,13 @@ var ts;
                     // after incremental parsing nameTable might not be up-to-date
                     // drop it so it can be lazily recreated later
                     newSourceFile.nameTable = undefined;
+                    // dispose all resources held by old script snapshot
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
                     return newSourceFile;
                 }
             }
@@ -41947,6 +41954,13 @@ var ts;
             var decoded = JSON.parse(encoded);
             return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
         };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
+            // 'in' does not have this effect
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
         return ScriptSnapshotShimAdapter;
     })();
     var LanguageServiceShimHostAdapter = (function () {
diff --git a/bin/typescriptServices.d.ts b/bin/typescriptServices.d.ts
index ae49ab102ad..e29f03ee3d8 100644
--- a/bin/typescriptServices.d.ts
+++ b/bin/typescriptServices.d.ts
@@ -1375,6 +1375,8 @@ declare module ts {
          * not happen and the entire document will be re - parsed.
          */
         getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
+        /** Releases all resources held by this script snapshot */
+        dispose?(): void;
     }
     module ScriptSnapshot {
         function fromString(text: string): IScriptSnapshot;
diff --git a/bin/typescriptServices.js b/bin/typescriptServices.js
index c2f23126ea8..a3b921d2341 100644
--- a/bin/typescriptServices.js
+++ b/bin/typescriptServices.js
@@ -36867,6 +36867,13 @@ var ts;
                     // after incremental parsing nameTable might not be up-to-date
                     // drop it so it can be lazily recreated later
                     newSourceFile.nameTable = undefined;
+                    // dispose all resources held by old script snapshot
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
                     return newSourceFile;
                 }
             }
@@ -41947,6 +41954,13 @@ var ts;
             var decoded = JSON.parse(encoded);
             return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
         };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
+            // 'in' does not have this effect
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
         return ScriptSnapshotShimAdapter;
     })();
     var LanguageServiceShimHostAdapter = (function () {