diff --git a/adapters/legacy-1_16_5/build.gradle.kts b/adapters/legacy-1_16_5/build.gradle.kts
index e6b96c1..5975b6e 100644
--- a/adapters/legacy-1_16_5/build.gradle.kts
+++ b/adapters/legacy-1_16_5/build.gradle.kts
@@ -5,7 +5,11 @@ plugins {
 
 java { toolchain { languageVersion = JavaLanguageVersion.of(21) } }
 repositories {
-    mavenCentral(); maven("https://jitpack.io")
+    // Use direct Central for stable Adventure artifacts; Paper/OpenCollab own the game APIs.
+    maven("https://repo1.maven.org/maven2/")
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.opencollab.dev/main/")
+    maven("https://jitpack.io")
 }
 dependencies {
     compileOnly(project(":transport-api"))
diff --git a/adapters/modern-1_21_11/build.gradle.kts b/adapters/modern-1_21_11/build.gradle.kts
index 7eca8a2..fea6a08 100644
--- a/adapters/modern-1_21_11/build.gradle.kts
+++ b/adapters/modern-1_21_11/build.gradle.kts
@@ -9,7 +9,11 @@ sourceSets.main {
     java.srcDir("../modern-common/src/compat-pre26_3/java")
 }
 repositories {
-    mavenCentral(); maven("https://repo.opencollab.dev/main/"); maven("https://jitpack.io")
+    // Use direct Central for stable Adventure artifacts; Paper/OpenCollab own the game APIs.
+    maven("https://repo1.maven.org/maven2/")
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.opencollab.dev/main/")
+    maven("https://jitpack.io")
 }
 dependencies {
     compileOnly(project(":transport-api"))
diff --git a/adapters/modern-26_1/build.gradle.kts b/adapters/modern-26_1/build.gradle.kts
index 8af1429..71bd6a0 100644
--- a/adapters/modern-26_1/build.gradle.kts
+++ b/adapters/modern-26_1/build.gradle.kts
@@ -9,7 +9,11 @@ sourceSets.main {
     java.srcDir("../modern-common/src/compat-pre26_3/java")
 }
 repositories {
-    mavenCentral(); maven("https://repo.opencollab.dev/main/"); maven("https://jitpack.io")
+    // Use direct Central for stable Adventure artifacts; Paper/OpenCollab own the game APIs.
+    maven("https://repo1.maven.org/maven2/")
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.opencollab.dev/main/")
+    maven("https://jitpack.io")
 }
 dependencies {
     compileOnly(project(":transport-api"))
diff --git a/adapters/modern-26_2/build.gradle.kts b/adapters/modern-26_2/build.gradle.kts
index 267226c..8670a3a 100644
--- a/adapters/modern-26_2/build.gradle.kts
+++ b/adapters/modern-26_2/build.gradle.kts
@@ -12,7 +12,11 @@ sourceSets {
     test { java.srcDir("../modern-common/src/test/java") }
 }
 repositories {
-    mavenCentral(); maven("https://repo.opencollab.dev/main/"); maven("https://jitpack.io")
+    // Use direct Central for stable Adventure artifacts; Paper/OpenCollab own the game APIs.
+    maven("https://repo1.maven.org/maven2/")
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.opencollab.dev/main/")
+    maven("https://jitpack.io")
 }
 dependencies {
     compileOnly(project(":transport-api"))
diff --git a/adapters/modern-26_3/build.gradle.kts b/adapters/modern-26_3/build.gradle.kts
index d31b5dc..8af8f58 100644
--- a/adapters/modern-26_3/build.gradle.kts
+++ b/adapters/modern-26_3/build.gradle.kts
@@ -12,7 +12,11 @@ sourceSets {
     test { java.srcDir("../modern-common/src/test/java") }
 }
 repositories {
-    mavenCentral(); maven("https://repo.opencollab.dev/main/"); maven("https://jitpack.io")
+    // Use direct Central for stable Adventure artifacts; Paper/OpenCollab own the game APIs.
+    maven("https://repo1.maven.org/maven2/")
+    maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo.opencollab.dev/main/")
+    maven("https://jitpack.io")
 }
 dependencies {
     compileOnly(project(":transport-api"))
diff --git a/build.gradle.kts b/build.gradle.kts
index f9b51ec..fe32b49 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -48,10 +48,15 @@ sourceSets {
 }
 
 repositories {
-    mavenCentral()
+    // Velocity 3.4.0 and TAB-API 6.0.0 are published outside Maven Central.
+    // Resolve their owning repositories first so an unavailable Central mirror
+    // cannot block the actual 26.3 build dependencies.
     maven("https://repo.papermc.io/repository/maven-public/")
-    maven("https://repo.opencollab.dev/main/")
     maven("https://jitpack.io")
+    maven("https://repo.opencollab.dev/main/")
+    // Paper's public proxy is used above for Maven Central artifacts as well.
+    // Keep repo1 as a direct fallback because Central intermittently times out here.
+    maven("https://repo1.maven.org/maven2/")
 }
 
 dependencies {
diff --git a/paper-companion/build.gradle.kts b/paper-companion/build.gradle.kts
index d62f2f6..f07c087 100644
--- a/paper-companion/build.gradle.kts
+++ b/paper-companion/build.gradle.kts
@@ -13,8 +13,10 @@ java {
 }
 
 repositories {
-    mavenCentral()
+    // Paper's proxy serves the legacy API and its Adventure transitive graph.
+    // Keep a direct Maven fallback without letting Central timeouts mask it.
     maven("https://repo.papermc.io/repository/maven-public/")
+    maven("https://repo1.maven.org/maven2/")
 }
 
 dependencies {