diff --git a/package.json b/package.json
index 482fe23..2c0b751 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "flow-bin": "^0.111.0",
     "jest": "^24.8.0",
     "jest-fetch-mock": "^2.1.2",
-    "prettier": "1.18.2",
+    "prettier": "1.19.1",
     "raf": "3.4.1",
     "react-dev-utils": "^5.0.0",
     "static-site-generator-webpack-plugin": "^3.4.1",
diff --git a/src/analysis/timeline/timelinePagerank.test.js b/src/analysis/timeline/timelinePagerank.test.js
index 3e1b5e4..a284071 100644
--- a/src/analysis/timeline/timelinePagerank.test.js
+++ b/src/analysis/timeline/timelinePagerank.test.js
@@ -25,7 +25,10 @@ describe("src/analysis/timeline/timelinePagerank", () => {
       const expected = [
         new Map([[foo.address, 2]]),
         new Map([[foo.address, 1]]),
-        new Map([[foo.address, 0.5], [bar.address, 0.5]]),
+        new Map([
+          [foo.address, 0.5],
+          [bar.address, 0.5],
+        ]),
       ];
       expect(weights).toEqual(expected);
     });
diff --git a/src/core/attribution/markovChain.test.js b/src/core/attribution/markovChain.test.js
index 768e398..23fa68e 100644
--- a/src/core/attribution/markovChain.test.js
+++ b/src/core/attribution/markovChain.test.js
@@ -34,7 +34,11 @@ describe("core/attribution/markovChain", () => {
 
   describe("sparseMarkovChainFromTransitionMatrix", () => {
     it("works for a simple matrix", () => {
-      const matrix = [[1, 0, 0], [0.25, 0, 0.75], [0.25, 0.75, 0]];
+      const matrix = [
+        [1, 0, 0],
+        [0.25, 0, 0.75],
+        [0.25, 0.75, 0],
+      ];
       const chain = sparseMarkovChainFromTransitionMatrix(matrix);
       const expected = [
         {
@@ -80,7 +84,11 @@ describe("core/attribution/markovChain", () => {
     });
 
     it("rejects a matrix with negative entries", () => {
-      const matrix = [[1, 0, 0], [-0.5, 0.75, 0.75], [0, 0, 1]];
+      const matrix = [
+        [1, 0, 0],
+        [-0.5, 0.75, 0.75],
+        [0, 0, 1],
+      ];
       expect(() => sparseMarkovChainFromTransitionMatrix(matrix)).toThrow(
         /positive real.*-0.5/
       );
@@ -101,7 +109,10 @@ describe("core/attribution/markovChain", () => {
     });
 
     it("rejects a non-stochastic matrix", () => {
-      const matrix = [[1, 0], [0.125, 0.625]];
+      const matrix = [
+        [1, 0],
+        [0.125, 0.625],
+      ];
       expect(() => sparseMarkovChainFromTransitionMatrix(matrix)).toThrow(
         /sums to 0.75/
       );
@@ -338,7 +349,10 @@ describe("core/attribution/markovChain", () => {
     });
 
     it("finds the stationary distribution of a periodic chain", async () => {
-      const chain = sparseMarkovChainFromTransitionMatrix([[0, 1], [1, 0]]);
+      const chain = sparseMarkovChainFromTransitionMatrix([
+        [0, 1],
+        [1, 0],
+      ]);
       const params: PagerankParams = {
         chain,
         alpha: 0,
@@ -359,7 +373,10 @@ describe("core/attribution/markovChain", () => {
     });
 
     it("returns initial distribution if maxIterations===0", async () => {
-      const chain = sparseMarkovChainFromTransitionMatrix([[0, 1], [0, 1]]);
+      const chain = sparseMarkovChainFromTransitionMatrix([
+        [0, 1],
+        [0, 1],
+      ]);
       const params: PagerankParams = {
         chain,
         alpha: 0,
diff --git a/src/core/graph.test.js b/src/core/graph.test.js
index fc1f5a3..d64b10f 100644
--- a/src/core/graph.test.js
+++ b/src/core/graph.test.js
@@ -994,7 +994,10 @@ describe("core/graph", () => {
             Direction.IN,
             [],
             [],
-            [{node: loop, edge: loop_loop}, {node: foo, edge: foo_loop}]
+            [
+              {node: loop, edge: loop_loop},
+              {node: foo, edge: foo_loop},
+            ]
           );
         });
         it("OUT", () => {
@@ -1076,7 +1079,10 @@ describe("core/graph", () => {
         it("works for a proper prefix match", () => {
           edgeExpectNeighbors(
             ["foo"],
-            [{node: foo, edge: foo_loop}, {node: foo, edge: loop_foo}]
+            [
+              {node: foo, edge: foo_loop},
+              {node: foo, edge: loop_foo},
+            ]
           );
         });
         it("works when there are no matching edges", () => {
diff --git a/src/explorer/legacy/pagerankTable/Node.js b/src/explorer/legacy/pagerankTable/Node.js
index c5a0179..beb2118 100644
--- a/src/explorer/legacy/pagerankTable/Node.js
+++ b/src/explorer/legacy/pagerankTable/Node.js
@@ -29,7 +29,11 @@ export class NodeRowList extends React.PureComponent<NodeRowListProps> {
     const {pnd, maxEntriesPerList} = sharedProps;
     return (
       <React.Fragment>
-        {sortBy(nodes, (n) => -NullUtil.get(pnd.get(n)).score, (n) => n)
+        {sortBy(
+          nodes,
+          (n) => -NullUtil.get(pnd.get(n)).score,
+          (n) => n
+        )
           .slice(0, maxEntriesPerList)
           .map((node) => (
             <NodeRow
diff --git a/src/graphql/mirror.js b/src/graphql/mirror.js
index 30f041c..9fbb267 100644
--- a/src/graphql/mirror.js
+++ b/src/graphql/mirror.js
@@ -861,9 +861,10 @@ export class Mirror {
       case "UNION":
         return [
           b.field("__typename"),
-          ...this._schemaInfo.unionTypes[typename].clauses.map(
-            (clause: Schema.Typename) =>
-              b.inlineFragment(clause, [b.field("id")])
+          ...this._schemaInfo.unionTypes[
+            typename
+          ].clauses.map((clause: Schema.Typename) =>
+            b.inlineFragment(clause, [b.field("id")])
           ),
         ];
       // istanbul ignore next
diff --git a/src/graphql/mirror.test.js b/src/graphql/mirror.test.js
index f5dc50d..0667c4c 100644
--- a/src/graphql/mirror.test.js
+++ b/src/graphql/mirror.test.js
@@ -2195,7 +2195,10 @@ describe("graphql/mirror", () => {
                 "ORDER BY o_id ASC"
             )
             .all()
-        ).toEqual([{o_id: "dos", p_rowid: null}, {o_id: "uno", p_rowid: null}]);
+        ).toEqual([
+          {o_id: "dos", p_rowid: null},
+          {o_id: "uno", p_rowid: null},
+        ]);
         expect(
           db
             .prepare("SELECT * FROM links ORDER BY parent_id ASC")
diff --git a/src/plugins/discourse/mirror.test.js b/src/plugins/discourse/mirror.test.js
index 572f52d..8ad2c7b 100644
--- a/src/plugins/discourse/mirror.test.js
+++ b/src/plugins/discourse/mirror.test.js
@@ -231,7 +231,12 @@ describe("plugins/discourse/mirror", () => {
   });
 
   function expectLikesSorted(as, bs) {
-    const s = (ls) => sortBy(ls, (x) => x.username, (x) => x.postId);
+    const s = (ls) =>
+      sortBy(
+        ls,
+        (x) => x.username,
+        (x) => x.postId
+      );
     expect(s(as)).toEqual(s(bs));
   }
 
diff --git a/src/plugins/github/parseReferences.test.js b/src/plugins/github/parseReferences.test.js
index 4944cf5..089aeaa 100644
--- a/src/plugins/github/parseReferences.test.js
+++ b/src/plugins/github/parseReferences.test.js
@@ -82,9 +82,9 @@ describe("plugins/github/parseReferences", () => {
       ]);
     });
     it("a link with surrounding context", () => {
-      expect(parseReferences("please see sourcecred/example_.repo#12")).toEqual(
-        [{refType: "BASIC", ref: repoRef}]
-      );
+      expect(
+        parseReferences("please see sourcecred/example_.repo#12")
+      ).toEqual([{refType: "BASIC", ref: repoRef}]);
     });
   });
 
diff --git a/src/plugins/github/relationalView.js b/src/plugins/github/relationalView.js
index cd58db5..9d7122c 100644
--- a/src/plugins/github/relationalView.js
+++ b/src/plugins/github/relationalView.js
@@ -295,9 +295,11 @@ export class RelationalView {
       issues: expectAllNonNull(json, "issues", json.issues).map((x) =>
         this._addIssue(address, x)
       ),
-      pulls: expectAllNonNull(json, "pullRequests", json.pullRequests).map(
-        (x) => this._addPull(address, x)
-      ),
+      pulls: expectAllNonNull(
+        json,
+        "pullRequests",
+        json.pullRequests
+      ).map((x) => this._addPull(address, x)),
       timestampMs: +new Date(json.createdAt),
     };
     const raw = N.toRaw(address);
diff --git a/src/plugins/github/relationalView.test.js b/src/plugins/github/relationalView.test.js
index 0504448..6231a54 100644
--- a/src/plugins/github/relationalView.test.js
+++ b/src/plugins/github/relationalView.test.js
@@ -57,12 +57,36 @@ describe("plugins/github/relationalView", () => {
         });
       });
     }
-    hasEntityMethods("repos", () => view.repos(), (x) => view.repo(x));
-    hasEntityMethods("issues", () => view.issues(), (x) => view.issue(x));
-    hasEntityMethods("pulls", () => view.pulls(), (x) => view.pull(x));
-    hasEntityMethods("reviews", () => view.reviews(), (x) => view.review(x));
-    hasEntityMethods("comments", () => view.comments(), (x) => view.comment(x));
-    hasEntityMethods("commits", () => view.commits(), (x) => view.commit(x));
+    hasEntityMethods(
+      "repos",
+      () => view.repos(),
+      (x) => view.repo(x)
+    );
+    hasEntityMethods(
+      "issues",
+      () => view.issues(),
+      (x) => view.issue(x)
+    );
+    hasEntityMethods(
+      "pulls",
+      () => view.pulls(),
+      (x) => view.pull(x)
+    );
+    hasEntityMethods(
+      "reviews",
+      () => view.reviews(),
+      (x) => view.review(x)
+    );
+    hasEntityMethods(
+      "comments",
+      () => view.comments(),
+      (x) => view.comment(x)
+    );
+    hasEntityMethods(
+      "commits",
+      () => view.commits(),
+      (x) => view.commit(x)
+    );
     hasEntityMethods(
       "userlikes",
       () => view.userlikes(),
diff --git a/yarn.lock b/yarn.lock
index 33d22a4..8ef274b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6740,10 +6740,10 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
-prettier@1.18.2:
-  version "1.18.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
-  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
+prettier@1.19.1:
+  version "1.19.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
+  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
 
 pretty-format@^24.8.0:
   version "24.8.0"