diff --git a/src/part-2-intro.md b/src/part-2-intro.md
index 5ea4d7b6b..aecab562b 100644
--- a/src/part-2-intro.md
+++ b/src/part-2-intro.md
@@ -1,4 +1,4 @@
-# Part 2: High-Level Compiler Architecture
+# High-Level Compiler Architecture
 
 The remaining parts of this guide discuss how the compiler works. They go
 through everything from high-level structure of the compiler to how each stage
diff --git a/src/part-3-intro.md b/src/part-3-intro.md
index c10080632..59a1eeba7 100644
--- a/src/part-3-intro.md
+++ b/src/part-3-intro.md
@@ -1,4 +1,4 @@
-# Part 3: Source Code Representation
+# Source Code Representation
 
 This part describes the process of taking raw source code from the user and
 transforming it into various forms that the compiler can work with easily.
diff --git a/src/part-4-intro.md b/src/part-4-intro.md
index 00a74f308..6a8433164 100644
--- a/src/part-4-intro.md
+++ b/src/part-4-intro.md
@@ -1,4 +1,4 @@
-# Part 4: Analysis
+# Analysis
 
 This part discusses the many analyses that the compiler uses to check various
 properties of the code and to inform later stages. Typically, this is what people