diff --git a/build.gradle.kts b/build.gradle.kts
index 001df5bb44..64743f78f5 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -50,6 +50,8 @@ configurations {
 
 dependencies {
     api(projects.core)
+
+    // expose all optional IO dependencies by default
     api(projects.dataframeArrow)
     api(projects.dataframeExcel)
     api(projects.dataframeJdbc)
diff --git a/dataframe-arrow/build.gradle.kts b/dataframe-arrow/build.gradle.kts
index 6251ad5240..7d9c8dc3c6 100644
--- a/dataframe-arrow/build.gradle.kts
+++ b/dataframe-arrow/build.gradle.kts
@@ -24,7 +24,6 @@ dependencies {
     implementation(libs.kotlin.reflect)
     implementation(libs.kotlin.datetimeJvm)
 
-    testApi(projects.core)
     testImplementation(libs.junit)
     testImplementation(libs.kotestAssertions) {
         exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")
diff --git a/dataframe-csv/build.gradle.kts b/dataframe-csv/build.gradle.kts
index c444ee4038..1a73328eed 100644
--- a/dataframe-csv/build.gradle.kts
+++ b/dataframe-csv/build.gradle.kts
@@ -38,7 +38,6 @@ dependencies {
     implementation(libs.kotlinLogging)
     implementation(libs.kotlin.reflect)
 
-    testApi(projects.core)
     testImplementation(libs.kotlinx.benchmark.runtime)
     testImplementation(libs.junit)
     testImplementation(libs.sl4jsimple)
diff --git a/dataframe-jupyter/build.gradle.kts b/dataframe-jupyter/build.gradle.kts
index 6cae686190..426b8718fb 100644
--- a/dataframe-jupyter/build.gradle.kts
+++ b/dataframe-jupyter/build.gradle.kts
@@ -18,15 +18,10 @@ repositories {
 }
 
 dependencies {
-    api(projects.core)
-    api(projects.dataframeJson)
+    api(projects.dataframe)
 
     testImplementation(libs.junit)
     testImplementation(libs.serialization.json)
-    testImplementation(projects.dataframeArrow)
-    testImplementation(projects.dataframeCsv)
-    testImplementation(projects.dataframeExcel)
-    testImplementation(projects.dataframeJdbc)
     // experimental
     testImplementation(projects.dataframeOpenapiGenerator)
     testImplementation(projects.dataframeOpenapi)
diff --git a/dataframe-jupyter/src/main/kotlin/org/jetbrains/kotlinx/dataframe/jupyter/Integration.kt b/dataframe-jupyter/src/main/kotlin/org/jetbrains/kotlinx/dataframe/jupyter/Integration.kt
index 47d11cfe87..3a26cfef35 100644
--- a/dataframe-jupyter/src/main/kotlin/org/jetbrains/kotlinx/dataframe/jupyter/Integration.kt
+++ b/dataframe-jupyter/src/main/kotlin/org/jetbrains/kotlinx/dataframe/jupyter/Integration.kt
@@ -170,12 +170,6 @@ internal class Integration(private val notebook: Notebook, private val options:
                     "org.jetbrains.kotlinx:dataframe-openapi-generator:$version",
                 )
             }
-            dependencies(
-                "org.jetbrains.kotlinx:dataframe-csv:$version",
-                "org.jetbrains.kotlinx:dataframe-excel:$version",
-                "org.jetbrains.kotlinx:dataframe-jdbc:$version",
-                "org.jetbrains.kotlinx:dataframe-arrow:$version",
-            )
         }
 
         try {
diff --git a/plugins/dataframe-gradle-plugin/build.gradle.kts b/plugins/dataframe-gradle-plugin/build.gradle.kts
index c8974b3c15..a1af8b4021 100644
--- a/plugins/dataframe-gradle-plugin/build.gradle.kts
+++ b/plugins/dataframe-gradle-plugin/build.gradle.kts
@@ -16,12 +16,7 @@ group = "org.jetbrains.kotlinx.dataframe"
 
 dependencies {
     api(libs.kotlin.reflect)
-    implementation(projects.core)
-    implementation(projects.dataframeArrow)
-    implementation(projects.dataframeExcel)
-    implementation(projects.dataframeCsv)
-    implementation(projects.dataframeJdbc)
-    implementation(projects.dataframeJson)
+    implementation(projects.dataframe)
     // experimental
     implementation(projects.dataframeOpenapiGenerator)
 
diff --git a/plugins/symbol-processor/build.gradle.kts b/plugins/symbol-processor/build.gradle.kts
index db2a3f5d17..11bb05cb4d 100644
--- a/plugins/symbol-processor/build.gradle.kts
+++ b/plugins/symbol-processor/build.gradle.kts
@@ -19,12 +19,7 @@ repositories {
 group = "org.jetbrains.kotlinx.dataframe"
 
 dependencies {
-    implementation(projects.core)
-    implementation(projects.dataframeArrow)
-    implementation(projects.dataframeExcel)
-    implementation(projects.dataframeCsv)
-    implementation(projects.dataframeJdbc)
-    implementation(projects.dataframeJson)
+    implementation(projects.dataframe)
     // experimental
     implementation(projects.dataframeOpenapiGenerator)
 
diff --git a/tests/build.gradle.kts b/tests/build.gradle.kts
index 58d9133794..28185b8f1b 100644
--- a/tests/build.gradle.kts
+++ b/tests/build.gradle.kts
@@ -19,11 +19,7 @@ repositories {
 }
 
 dependencies {
-    implementation(projects.core)
-    implementation(projects.dataframeExcel)
-    implementation(projects.dataframeCsv)
-    implementation(projects.dataframeJdbc)
-    implementation(projects.dataframeArrow)
+    implementation(projects.dataframe)
     testImplementation(libs.junit)
     testImplementation(libs.kotestAssertions) {
         exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")